Honda-SOHC

SOHC.co.uk Forums => Project Board => Topic started by: AshimotoK0 on November 29, 2015, 01:11:00 PM

Title: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on November 29, 2015, 01:11:00 PM
Initial Introduction post here:

http://www.sohc.co.uk/index.php/topic,9095.0.html

Dropbox link to stripdown at 'Dodgy Rogers' place, so please  don't come back to me saying my workshop is a tip ... it's not mine it's Rogers ( he bought James 1960 BSA Road Rocket) . Too many bikes at home at the 'mo. plus hidden from the family as I now have 7 bikes on the go  :D

https://www.dropbox.com/sh/0agtuuiwlapg1dh/AADb1p7iwRSvBHqGgW0-ueeKa?dl=0

Dropbox Link to 'as bought' pics:-

https://www.dropbox.com/sh/21k9xuwo609j418/AADTBR1RfmDbkqt3aPvZxzO7a?dl=0

Good points found:

Really early VIN with rare crankcases
Cam and rockers look good, engine turns over with compression  .. oil not too dirty was probably cared for.
Bike came with USA title.
Front forks not pitted at all in chromed area so just needs new seals.
Rear drum not cracked and bearing retainer not too nadgered up.
Frame  and swinging arm looks pretty free of any major corrosion.
Wiring loom has dreaded Scotchloks from fairing fitted, maybe, but salveagable with a bit of repair.
Alternator checks out fine electrically.
Generator cover not marked.
Drilled front disk not scored ... good swapping item for non-drilled one.
Nice alloy rims .....good swapping material   (want to use non-scripted re-chromed DID originals).
Kickstart, brake pedal, gear lever and standard USA handlebars not too pitted will definitely re-chrome OK.
Clocks look fairly good, redline still red !

Bike stripped ... just need to free off stubborn lower front engine mounts with out damaging the rare crankcases.


Obvious bad points:

Both guards beyond repair but got a new front one from DS ( needs smaller hole stays though to be strictly correct) and hopefully getting a 3-hole rear at least suitable for re-chrome
Top alloy yoke clamp broken .. Member Bryan has found me one  :) plus some other bits.
Grab rail missing but member Kent400 has one for me.. pretty sure it's the right one but if not Bryan has a rechromeable one.
Tank disgusting inside but squeaky clean spare one from James  ...need to get it to Menno ASAP with covers for re-paint.
Seat beyond repair ... pan totally corroded on one side .. got a replacement from DK but it had an old  mouse nest in the foam and all eaten away and pan looked brilliant on the outside but really badly corroded on the inside .... getting a refund/replacement but they are letting me keep the old one with it's fittings. If I can't find a decent one I may epoxy/glass fibre the underside, as the outside looks fairly pristine. Got a new cover & strap from Japan. it's here and already landed in the UK:
 
http://page.auctions.yahoo.co.jp/jp/auction/199534617

Main issue is going to be finding new standard pipes that are double skinned headers. (was amazed to find the rusty headers fitted to it are double skinned .. the aftermarket 4 into 2 must have used the stock Honda header pipes).

All in all well pleased with it so a BIG thanks to James for selling it to me (along with the CB175K4, which just needs cosmetic resto to retain its lovely patina)

 



Title: Re: 1971 CB500K1 Resto 3/71 VIN 1000896
Post by: Trigger on November 29, 2015, 07:36:04 PM
The head line states K1, I thought you were doing a 1971 KO ash  ;D  ;D ;D
Title: Re: 1971 CB500K1 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on November 29, 2015, 08:19:23 PM
The head line states K1, I thought you were doing a 1971 KO ash  ;D  ;D ;D

Whoops well spotted
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Nurse Julie on November 29, 2015, 08:34:57 PM
Good thing you replied quickly Ash, Trigger was about to try and sell you loads of K1 parts  ;D ;D ;D
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Woodside on November 30, 2015, 07:15:56 PM
Does anyone know how many of these early engine 500's were made.?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Woodside on November 30, 2015, 07:19:55 PM
Well asking that question made me an expert?
So perhaps I should know
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on November 30, 2015, 08:55:20 PM
Ha ha expert indeed. No-one really knows. I have vin # 2064 which has the same crankcase design. When I listed ash's bike on eBay earlier in the year someone dropped me a line and told me it was rare and that I should double the asking price. Gut feel is that they changed the design after ~2500 were produced...anyone here have a vin in the 2500-3000 range?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on November 30, 2015, 09:02:33 PM
Cleaned some parts in paraffin parts washer then fine bead blasted ready for stripping and replating.

[attachimg=1]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on November 30, 2015, 09:31:14 PM
Also blasted the good fuel tank ready for Menno's Magic .. just a few spots on it to re-do.

Bead blasted the old chromed steel front wheel (750 K1) that came with my 750K0 ... need opinions on the pitting on inside. i left the spokes and hub on and it's still seems to balance with corrosion blasted off .

Bryan may have a re-chromable rear DID 18" 1.85 40-hole to sell me . If not does anyone have one to sell with minimal inside of rim corrosion? been quoted £10-15 to strip chrome locally.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Woodside on November 30, 2015, 09:38:40 PM
I have a few sets of wheels ..All from 500's
.I will check them out tomorrow. ..no promises on condition...
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: RGP750 on November 30, 2015, 10:08:12 PM
I have a rim i got a couple of weeks ago from Chris on here, he was going to scrap it but i got it for "future projects"
but you are welcome to it Ash
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 01, 2015, 10:13:24 AM
I have a few sets of wheels ..All from 500's
.I will check them out tomorrow. ..no promises on condition...

Hi ... I think Rich has found one suitable for rechroming  but most grateful for the offer.

Cheers ...   Ash
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on December 01, 2015, 02:33:00 PM
great project ash , i look forward to seeing your progress
pete
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 01, 2015, 08:14:38 PM
Paint stripped the spare  Sunrise Flake Orange  tank (squeaky clean inside). then fine bead blasted.. man !!  was that paint stubborn to remove.  Just need one lug repair on one panel and then off to Menno Dek to work his magic .. Candy Jade Green.... 1st time I used him, used Andy Parnaby last time for my 750K0. I have paint sets for my CB250/350 twins to get done  and Andy is painting one the same Candy Red and white at the 'mo for another customer,  so decided  I will send those to him. Always an awkward call splitting the work but trying to be fair to both painters. Decided my JDM twin is metallic grey almost  black (same colour  as CD175A 1967-1970)  NOT candy so going to get the paint from RS Bikepaints and get a local car place owned by the mate of the GM at work, to paint that set. We will see how it pans out in the New Year after I get them all back,and I will post on here.

Freed off the master cylinder, not got the caliper piston out yet. Solid brake union into caliper freed off OK but I snapped off the bleed nipple. I should have heated it first but I was knackered and didn't consider the job properly.  The hex was perfect so I hoped it would come out OK. Going to try to build up with weld until there is a large blob on the top and then file flats on the blob until a spanner will fit. failing that then drill out carefully. This worked like magic on a really stubborn broken of 750K0 cylinder stud last month.

[attachimg=1][attachimg=2]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on December 01, 2015, 08:16:52 PM
Looks like you're giving that bead blaster a good workout ash!! Nice progress.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 01, 2015, 08:31:12 PM
Looks like you're giving that bead blaster a good workout ash!! Nice progress.

Yea I just love bead blasting   :-*  I find  it really  therapeutic ... I have blasted the hell out of 50/100 glass beads and it takes a while to strip but the finish is mega fine. 
Wife just got back from overnight stay in London with my daughter   .. "Hope you wasn't bored last night without us" ... think you all know what the answer was that I muttered under my breath  ;D ;D
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: matthewmosse on December 01, 2015, 09:56:33 PM
I now do shot blasting at work and we are having issues with both the rough finish the metal shot leaves and the reclaim system not being up to recovering the metal shot afterwards. What exactly is the blast media you are using, would it be re useable and is it costly and would it cope with removing rust and scale? I am wondering if we need to investigate different products a bit, to my mind a rough finish is ok on industrial kit and working fast is kind of vital for us but I am wondering if the bead blasting might answer their requirement for a finer finish, it looks like it could be almost used to just get a keyed finish on powdercoat rather than go back to bare steel. A lot of what I end up doing is just sanding stuff to get a key.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 02, 2015, 12:14:39 AM
Hi Matt  ...I use this ... scroll down to 50/100 grade "Vixosheen"

http://www.ebay.co.uk/itm/Vixen-Vixosheen-Glass-Bead-Media-25kg-Blasting-Shot-Sand-Grit-Abrasive-/321928939735

Pic of the cabinet (Vixen) attached. The extraction/media recovery system works well on it.

It definitely removes rust but not the best grade/media for thick paint but paint on frame parts (like footpegs etc) comes off great with it.

[attachimg=1]



Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on December 02, 2015, 06:40:14 AM
Thats a good piece of kit to have use of ash
pete
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 02, 2015, 08:17:45 AM
Yea Pete .. Like I said to James when I met him, I work now 3 days/week for a mate of mines company (I still have my own electronics design business though) . As a joke really, my mate, the owner  called me in at  'Staff Appraisal' time, which was just a load of jokes and banter really. He asked me what was the best reason for joining the company and he was surprised by the answer, which was  " By a mile ...  the access to use of the bead blaster"  ;D ... He was expecting something more corporate and deeper meaning I think. Myself and another guy who's building a CX500 cafe racer conned him into buying the blast cabinet after we got flooded. I think it's done about 2 hours blasting for the purpose it was supposedly bought for  ;D.

BTW you may remember I came up with a brew (caustic soda/EDTA and Trietholamine) for removing zinc plate ) .. well I pinched the slow cooker out of the loft (unused for about 25 years) to heat the 'brew' with ... Hence no invites to any of you for a casserole at my place... Well I bought the wife a new one from Aldi for 12.99 at the weekend   .. Worth buying for rubber soffening /de-plating zinc etc for that money.  Oh and you are safe to eat at my house again if you ever visit  ;)
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Johnwebley on December 02, 2015, 10:41:47 AM
thanks Ash,

 I really enjoy your threads,

 but this post made me chuckle,

 keep up the good (brilliant) work and words !!
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: matthewmosse on December 02, 2015, 09:16:27 PM
Thanks for the info, will add it to the miniscule bit of knowledge I have scraped together so far. Had a different set of issues with the blasting kit today. The kit we have at work is a bit more industrial then that - kind of a steel lined room 6 by 10 metres and 4 high, with a 8 foot monster of a reclaim unit outside connected to a hopper built into the floor, the issue with it is getting the reclaim unit to suck 250 kilo of steel shot out of the hopper, it struggles a bit but I think I have figured it out now, issue being it needs just the right ammount of airflow down between the walls of a twin wall pipe and up the suction hose that is the inner pipe. Now the damp weather means just as I resolved that the shot in the blast pot is caking up thanks to moisture getting in there in this damp weather. I wish I could bring my projects into work to do at lunchtimes, but I doubt I would still have a job if I did. I would love to get a shot blaster at some point, gets the job done so much better and faster.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 03, 2015, 02:41:39 PM
Ha ha expert indeed. No-one really knows. I have vin # 2064 which has the same crankcase design. When I listed ash's bike on eBay earlier in the year someone dropped me a line and told me it was rare and that I should double the asking price. Gut feel is that they changed the design after ~2500 were produced...anyone here have a vin in the 2500-3000 range?

got this back from someone on the USA site:

"Oh, yes I didn't notice that, now I see what you mean!

None of my three 21's have that squared of bit at the front. (2141XXX, 2153XXX, 2156XXX)

John"
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: SteveD CB500K0 on December 03, 2015, 04:00:56 PM
... presumably because his "21s" are all K2s ...   :)

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on December 03, 2015, 04:11:40 PM
This is definitely an early 500 k0 feature. I have VIN 1015771 and 1047327 (both K0's) and both have the later rounded case design.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 05, 2015, 03:39:34 PM
Had a bit of a blast last night after work. rear hub looks fine. Not even attempted to move the retainer yet until I have made a tool for it. Is is LH thread? It is made of steel, are they supposed to be alloy?
header pipes double skinned must be originals chopped from standard pipes (you can see the spot weld in the pics). Going to strip down the electrical parts to re-plate.

Got the engine out. One lower bolt was not too stubborn but the other side I had to chop through the nut with a slitting disc/cold chisel. Not blasting the lower yoke, just going to repaint it.
[attachimg=1][attachimg=2][attachimg=3][attach=4][attachimg=5]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 05, 2015, 03:42:13 PM

[attachimg=2][attachimg=3]
[attachimg=4]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 06, 2015, 07:53:33 AM
Just been investigating the black finish on the carb rubber clips and the top yoke 'D' spacers. At first wondered if it was 'Japanning' ..like you get on old screws and tacks but convinced it more likely to be black passivate, which I didn't know existed but Gateros plating do it. Problem is its £24 as compared with about a tenner for the blue/gold chromate passivate. Will ask the barrel platers if they can do me a few items, may be cheaper or get Gateros to supply me 1 litre instead of 5l as unlikely to ever use it again.

Can someone confirm that the 500K0's had black finish  clips originally please? The pic below is of a K2 not a K0.  the other pic is of the the ones I have (after bead blasting). Going to dunk them in my 'brew' in the slow-cooker today to remove any traces of zinc, corrosion. If they are indeed zinc plated I will see loads of bubbles, when I dunk 'em.

[attachimg=1]

[attachimg=2]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 06, 2015, 08:15:25 AM
Forks are perfect in the chromed area no pitting whatsoever. Usual corrosion around bottom yoke clamp but I can deal with that. I masked the sliders from the bead blasting with 'gaffer' tape and I will use chemical stripper to try to retain the original finish before applying new clear coat.

MY ADVICE TO ANYONE IF JAMES H  IS SELLING A "PROJECT" BIKE...  GET IN THERE FAST AS BOTH BIKES I GOT FROM HIM ARE SPOT ON  ;D

[attachimg=1]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 06, 2015, 11:14:53 PM
As the stanchions are covered with the gaiters why not have them hard chromed by Philpotts, hopefully that may also cover the corrosion where they meet the yokes.

Chrome is perfect .. seems a shame to spend 170 quid when the chrome has survived over 44  years ... having said that, I deliberated over this on my 750K0 and bought brand new  Yamiya stanchions. Has anyone else used /treated Honda stanchions that have perfect chrome but corrosion near the clamp area? I don't want this bike to become a money pit like the 750K0 or remain in pieces forever (like the 750). Big determining factor is if I manage to get stock pipes with D/Skinned headers or not.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: mickwinf on December 07, 2015, 08:03:28 PM
I believe that the original stanchions were only chromed on the area below the bottom yokes as the rest is covered by the headlamp brackets, mine stayed rusty!
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 08, 2015, 10:03:21 PM
Made this rusty bad boy after work today to try to remove rear hub bearing retainer. A quick clockwise tug did nothing but need to have a proper go tomorrow. Bolts are specials from a Kwak Z900 ...hows that for extravagance  ;D.

Read on the US site that you can hot tank the hub in the Ultrasonic cleaner to remove internal corrosion. Worth a try before I fk it up,

[attachimg=1]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on December 08, 2015, 10:12:35 PM
Nice work ash, was that the kitchen worktop you have your exhuast on LOL
if your keeping the cost down then i would just treat the rust fork area if its no more than surface pitting
Keep up the good work
pete
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 08, 2015, 10:18:36 PM
Nice work ash, was that the kitchen worktop you have your exhuast on LOL
if your keeping the cost down then i would just treat the rust fork area if its no more than surface pitting
Keep up the good work
pete

Wife was out   :)  If she's in Am Dram 'play' mode she'd probably not even notice it anyway. .... its sqeaky clean now anyway since I washed it in the parts washer then  bead blasted it.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on December 08, 2015, 10:22:26 PM
Liking your style ash
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 09, 2015, 06:46:12 AM
Hmm .. The arrow to me means the tightening direction (CCW) for a LH thread so CW for unfastening .. or is too early in the morning. Not going to tug to hard on that retainer ... will heat the old US bath up and hot tank it for an hour or so.

BTW Found a great way of removing side reflector from the fork ear without damage ... push a CB750 K0->K6 carb inlet rubber onto it and unscrew that way. Loads of friction grip and zero damage to rare small reflectors (CB 250/350K2 part too I think)
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: flatfour on December 09, 2015, 03:31:11 PM
I bought the tool from Silver's to remove my CB500 hub retainer last year. Incredibly tight all the way out, I had to have several attempts at it and yes, it was a left - hand thread (1974 UK model).
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 09, 2015, 10:57:42 PM
I know it's a left handed thread, the manual says so, however it doesn't make sense why Honda would do that as it loosens as the wheel spins, usually they'd have the tightening for security reasons if nothing else. Clockwise is the direction to undo a left handed thread so you were going the right way Ash, just threw me for a moment that.

Rotary inertia when braking?  Dunno?

Anyway Hot tanked it in a big Ultrasonic cleaner for three hours tonight as recommended by SOHC.net USA site ... still no joy. Soaked it in WD40.... again! Going to try lots of heat tomorrow but with care not to melt cush drive rubbers... difficult ! Also will drill stakes out a bit more just in case.

Had day off but worried I would fk it up if I didn't try US hot tanking firsts, so decided to investigate the cause of the non-operational kickstart on it's baby brother  it came to me with....the CB175K4... see new thread
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 10, 2015, 08:15:45 AM
I find that a good shock will sometimes start them off, once you have them going things go a lot easier. Try whacking the tool with a heavy hammer to see if you can shock the threads loose. Sometimes you need to do this in order to break the thread locks grip.

As far as I recall the rear retainer is not staked, unlike the front one.

Yea FBH I guess. Problem is, and it's my fault entirely, I stripped the wheel first not realizing what a b*st*rd these are to remove. Think I will weld a bar to the old sprocket to get a good purchase on it. Stripped the alloy retainers from about 12 Honda hubs, without the proper tool, over the past two years and never ruined one yet. But these are something else.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on December 10, 2015, 05:17:18 PM
Yup, were always a barsteward to undo and all I ever had was a hammer and punch. Cant remember any stakings on the rear one. Talk to me if you damage it Ash as parcel is slowly being built up mate
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 11, 2015, 06:47:31 PM
Had another go tonight .. made a 5 foot long extension bar and heated the retainer as hot as I dare without damaging the cush drive , still no luck . Only thing I can think of now is it to locally heat the retainer by mig welding the top (high power mig at work) or just machine it out  and buy a new one. Getting pi@@ed of with it now .. it has to be the worst job by a mile  to do on any Honda I have ever owned.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: mike the bike on December 11, 2015, 07:15:31 PM
How about cutting a slice out with a dremel.   The thickness oof the kerf should be enough to loosen it.  I shifted a bearing shell like that.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 11, 2015, 10:13:20 PM
How about cutting a slice out with a dremel.   The thickness oof the kerf should be enough to loosen it.  I shifted a bearing shell like that.

Yes ....not a bad idea  Mike.. Think I am just going to get a repro retainer from Silvers for 24 quid unless anyone on here has one to sell me.

Came home fed up after struggling in the freezing cold with the retainer on my own, so decided to do a few jobs that are totally within my comfort zone. Stripped switches, look fine. I have  reels of the correct sleeving for both sides   from way back. Will bead blast the housings and then paint and bake with PJ1 satin black, then light polish with Solvol.  I know renowned, top-notch restorers who use this method. Got spare parts as I just got repro Yamiya switches for my 750K0 and some parts are common but all contacts ect look fine and PVC wiring is still soft. Original black sleeving was toast.

Bars look OK and would look fine  if cleaned up but taking them tomorrow with kickstart etc.  to get the plating stripped, then I am going to polish and then get rechromed.

Repaired the one broken lug on one of the side panels... have to get it over to Menno Dek next week with the other side and the tank. Just love Candy Jade Green. Used the patent Ashimoto repair 2-pack adhesive mixture.

YES Pete it's the kitchen worktop again and she saw me doing it. She didn't moan .. just asked where her cuppa was !  After all these years I think she's given up and accepted it  :D

[attachimg=1]

[attachimg=2]

 
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Rozabikes Tim on December 11, 2015, 10:40:45 PM
"Used the patent Ashimoto repair 2-pack adhesive"

Pray tell?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 11, 2015, 11:46:59 PM
"Used the patent Ashimoto repair 2-pack adhesive"

Pray tell?

Mix this stuff below :- with 50/50 ground ceramic powder/aluminium powder until its the consistency of soft butter. Bond the two surfaces together with it (immerse the container in boiling water so the adhesive flows' ( it takes yonks to cure at room temperature) put the excess in a container in a sealed plastic bag in the freezer (don't tell the missus  :D) Once cured up ( about 24 hors)  take epoxy mix out of freezer and 'defrost' then build up behind the joint with the defrosted 'putty'. Wear disposable gloves !When hardened, fully post cure at about 65°C for about an hour until  it cures rock hard. Sand down to correct contour.  Trade secrets ... blah .. tell everyone, that's my motto.

http://uk.rs-online.com/web/p/potting-compounds/1991468/?searchTerm=199-1468&relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D6265724D504E266C753D656E266D6D3D6D61746368616C6C26706D3D5E5C647B337D5B5C732D2F255C2E2C5D5C647B332C347D2426706F3D313426736E3D592673743D52535F53544F434B5F4E554D4245522677633D4E4F4E45267573743D3139392D3134363826
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Rozabikes Tim on December 12, 2015, 07:43:45 AM
Seems expensive when you consider raw material costs unless you have access to them already / needing a lot? Or is it simply far superior to off the peg stuff
Being of Yorkshire extraction I'm sure you will have considered the economy of the process!:-P;-)

Tim

Tim
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 12, 2015, 07:53:19 AM
Seems expensive when you consider raw material costs unless you have access to them already / needing a lot? Or is it simply far superior to off the peg stuff
Being of Yorkshire extraction I'm sure you will have considered the economy of the process!:-P;-)

Tim

Tim

Hmm  .. it is expensive but it's for 500ml of the stuff...plus I have a trade account and delivery is free.  Compare this with how many tubes of Araldite in there and cost in B&Q. Plus it's industrial strength stuff NOT Araldite and it is the dogs as far as bonding is concerned  you can use it all over the place. Been using it for over 30 years in my job.  If anybody want's a bit for a side panel repair I will gladly donate a bit plus postage. The other thing is ..how much for a replacement panel plus dreaded postage? Dread to think how much money I have spent in the last 7 years of restoration on delivery charges !!
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: royhall on December 12, 2015, 09:09:56 AM
Only just spotted this thread Ash, don't know how I missed it. Took me a while to read through the first four pages but up to speed now.

My 350F forks were rusted at the top same as yours but the working area was perfect. I just cleaned the rust off and treated them with a rust eater/preventer (cant just remember what its called, will check) and put them back together. That's how Honda made them in the first place, chrome was very expensive back then.

The bearing retainers in the wheels are a real pig to get undone, your going to destroy the retainer whatever you do. If you check my 350F thread it shows on there how I got them out. It was basically 3 days of heating them up and blasting with PlusGas whilst still hot, then soaking them again after it cooled. It more or less went on its own after that. But it 'picked up' on its way out, so it was back a bit forwards a bit for ages until it came free. It left the very fine threads in the hub damaged, these had to be cleaned up at the machine shop.

Will be following the thread with interest now I've found it.

Good luck with the build.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: mickwinf on December 12, 2015, 10:30:51 AM
If you damage it when you finally remove it I have a spare you can have
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 12, 2015, 12:04:56 PM
If you damage it when you finally remove it I have a spare you can have

Cheers Mick .. I will have another go Monday. Have another thought that I could mig weld the bar to the retainer  and at the same time get some real heat in there. Just got to be careful I don't melt the alloy though.

cheers Ash
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: matthewmosse on December 12, 2015, 01:12:34 PM
Ahh, those rear retainers, mine didn't want to budge after an attack off a 180 amp mma welder to stick a steel bar on and then wd40 plus a cracking good bash off a club hammer. I think if it has to come off then mike might be right, slit it with a dremel. It might even be possible to re weld once removed if carefull and lucky.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: royhall on December 12, 2015, 01:34:13 PM
Brute force does not work on these retainers guys, you will just destroy the hub.

This is probably the only application that WD40 isn't good for. You need genuine PlusGas Easing Fluid along with heat and a huge pile of patience.

PlusGas is like a magic bullet to stuck mechanicals. Been using it for years, and its the best out there.

No I'm not selling it before anyone asks. ;D
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on December 12, 2015, 01:47:55 PM
Good value too....
http://www.toolandfix.com/plus-gas-lubricant-aerosol.html?utm_source=google_shopping&prod_id=19415&gclid=Cj0KEQiAqK-zBRC2zaXc8MOiwfIBEiQAXPHrXk2yRzKFwLdI7IpzbNb7KqwaLuzUO8ShyaefAwl3cEIaAh4-8P8HAQ
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: royhall on December 12, 2015, 02:00:58 PM
Wow. I haven't seen it that cheap in years £3.18p each if you buy 12. Good find James. This is the stuff to use guys, and don't forget the cart load of patience.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 12, 2015, 05:35:50 PM
Yes I got that for releasing a pivot tube on my 750K0 centre stand ... ended up drilling it out what a b*st*rd of a job that was ... but not as bad as that retainer. Always did reckon plus gas was the best though .. my greeb mates at school (Royal Oilfied Crusader sports / 3TA etc).

 Did the welding damage the alloy at all Matt?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: matthewmosse on December 12, 2015, 09:39:17 PM
On mine I got away with it, was able to simply grind the welds back and re think my plans to re line the hub's drum brake so as to not have to disturb the bearings. Done quite a few miles since, sidecar outfit so not exactly light on the hub, seems to have held up to it.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on December 13, 2015, 05:24:44 PM
Ash, ring me tonight if you can Bryan
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 13, 2015, 11:09:14 PM
Cheers Bryan .. will call.

Took a load of chrome to be stripped locally on Saturday morning (£40-> £45) for the lot.

Autojumble at Newark today very little Honda stuff .. got some really rare CB250K0 fork ears for a tenner  CB750 Tacho for a fiver plus 5L of PROPER   paint stripper for £20. AND a tin of PLUSGAS (£4) releasing fluid.

[attachimg=1]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on December 14, 2015, 08:22:33 AM
Good result ash
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 14, 2015, 11:26:04 AM
Why is one of the exhaust collars different?

One is photoed upside down.. they are CB750 not 500
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 14, 2015, 08:57:56 PM
Heated and soaked the retainer with PlusGas, several times during the day and welded a 4 foot bar to the old sprocket. Discussed with Bryan and we both had the same thought that if you pass a threaded rod through the bearings to  clamp the removal tool to the  retainer/hub, then this  helps prevent the 4 pegs riding out. With a 5 foot bar on the removal tool, I  finally got it to unfasten by 3/4 of an turn but had to get home so left final removal until tomorrow. Still 'kin tight though ! Mine was definitely staked inside  the 4 peg holes. possibly by a PO /possibly because it's a very early production VIN. Dunno but can't believe the extraordinary high torque required to move it.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 15, 2015, 07:55:50 AM
Hallelujah !! it's out and not too much damage ... definitely re-usable. What a tw*t of a job that was. Thanks to everyone for you advice plus Bryan & Mick ( sounds like a dodgy Lowry song singing duo from way back),  who had a spare on hand if I f'ked up. See photos ..definitely staked !!!

Few pics to bore you with.

IF ANYONE IS DOING THIS JOB, ONCE I HAVE REPLACED THE BEARING,  I WILL GLADLY SEND THE TOOL TO YOU.. not the bars though ... too heavy.

[attachimg=1]
[attachimg=2]
[attachimg=3]
[attachimg=4]
[attachimg=5]

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on December 15, 2015, 08:40:07 AM
Phew, great work here and absolutely loving this thread. You're a very skilled and patient man indeed....
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: hairygit on December 15, 2015, 09:13:39 AM
No good in your case Ash as you were already stripped to the hub, but for anyone else trying this, it's much easier to leave the tyre on the complete wheel. Then clamp the removal tool firmly in a good bench vice, place the retainer on the tool, and turn the wheel. You can apply a lot of turning force like that, and it has never failed me yet!

Sent from my X5 using Tapatalk

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on December 15, 2015, 09:21:28 AM
Now he tells you ;-) !
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: hairygit on December 15, 2015, 09:50:03 AM
I know Jamesh, but Ash had obviously stripped the wheel before mentioning it in the thread, and I very much doubt he'd have wanted to put it all back together just to get the retainer out!

Sent from my X5 using Tapatalk

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on December 15, 2015, 09:53:28 AM
:-) was only joking. He isn't hanging around on this one. Good tip though thanks for sharing.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 15, 2015, 09:58:53 AM
Yes you, are correct, I have removed about a dozen 'standard' retainers in my time from just the hub. With hindsight on this .b*st*rd ..should have left wheel intact. Still took an extraordinary torque to remove though. Dunno if the one on eBay that the recently appointed custodian of Dave Silvers museum sells would be man enough for the job. Think I did mention in an earlier post that I wished I had left the wheel intact. No sign of any threadlock BTW just  staking.


Quote from: Oddjob on December 09, 2015, 11:26:02 pm
I find that a good shock will sometimes start them off, once you have them going things go a lot easier. Try whacking the tool with a heavy hammer to see if you can shock the threads loose. Sometimes you need to do this in order to break the thread locks grip.

As far as I recall the rear retainer is not staked, unlike the front one.

Yea FBH I guess. Problem is, and it's my fault entirely, I stripped the wheel first not realizing what a b*st*rd these are to remove. Think I will weld a bar to the old sprocket to get a good purchase on it. Stripped the alloy retainers from about 12 Honda hubs, without the proper tool, over the past two years and never ruined one yet. But these are something else.
Modify message
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 15, 2015, 03:29:05 PM
Well you can see from the photo it was staked and don't forget this is VIN less than 1000 so Honda may have changed assembly methods early on but also  there was evidence of a PO removing the retainer to replace the bearing . TBH the bearing is probably fine but there is no way I am rebuilding a bike of unkown history and reusing wheel bearings. I did admit that I should have left the wheel intact but that's the thing with forums, you try to do a warts and all log and in doing so embarrass yourself  ;D ;D ;D
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: totty on December 15, 2015, 05:12:58 PM
It was staked on my 550K3, but I have no way of knowing how it left the factory.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on December 15, 2015, 05:43:53 PM
Nothing embarrassing about your approach ash. I'm more embarrassed about selling a bike to you in that state!!!
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 15, 2015, 07:22:02 PM
No need to be embarrassed James .. well chuffed with it .. it's generally much better than I thought and it means I will now own one of the first 20 batch of UK CB750K0's and a CB500K0 from the first month of production. I just have to show you inside the point cover .. a real Ashimoto setup.

Not sure on the bearing yet Ken , I just got the retainer out and then  got on with my day job. I will post as soon as I get it out.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 16, 2015, 07:43:28 PM
Removed bearings tonight both made by NTN  Ken (Oddjob).
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 16, 2015, 11:48:52 PM
Can't say I recognise that manufacturer Ash, I think maybe they have been changed in the past. Sometimes the parts book would say what make they were as standard but I've just looked and it doesn't. Might be right but I don't think so. I think maybe they were Koyo bearings as standard.

Oh found the front disc today BTW, just need to remove it. Might have a look and see what bearings are in that wheel as it looks like it's never been touched, thought it might have been the wheel where I'd had the rim rechromed and used chromed spokes but these look standard. Disc will need a good cleanup Ash but it is undrilled.

Yes bearings actually looked pretty good (will change anyway) and previous signs of removal of retainer, so probably changed by PO. Disc sounds good.. any look with finding the 3-hole rear guard please Ken ?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: ST1100 on December 19, 2015, 10:19:55 AM
... I have found some pics of the 3 hole...
Interesting, are all fenders supposed to have the studs in the top mounts, or is that a K0 thing?
I only know those with weld-in nuts and M6 bolts coming from the top...
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 20, 2015, 11:04:10 AM
Here is the mudguard off the bike no rot ...shame that it is so cracked  :( .

I would rather hang on to see if you can find the NOS one in the loft if you have it Ken. What's the chances you may be able to find it, please?

Does anyone know the difference between the CB500 3 hole and the CB750K1 3-hole rear guard?



[attachimg=1][attachimg=2]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 20, 2015, 11:07:34 AM
Removed Bearings (using M12 studded bar and washers as extractor).. Degreased in paraffin washer ...then re-beadblasted.

Some serious polishing to do over Christmas break  :)

[attachimg=1][attachimg=2]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 20, 2015, 11:18:17 AM
Tank and panels prepped for sending to Menno in Germany. Bryan is kindly selling me a RH NOS side panel in green.

[attachimg=1][attachimg=2][attachimg=3]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 20, 2015, 11:23:45 AM
Original seat pan fooked see pic.

Bought one from DK with supposedly good foam and pan but foam had the remains of a mouse nest in it and pan after blasting looks great on the underside but serious corrosion on the foam side. Complained to DK and they said bin the one they sent me and they will try to find me a better one. Nothing back yet from them though.


DK PAN

[attachimg=1][attachimg=2]

FOOKED ORIGINAL SEAT PAN

[attachimg=3]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Woodside on December 20, 2015, 11:51:11 AM
Is the pan completely fubard. ...
Have you not a potion in your arsenal you could coat it with...to contain all the crud ..kind off gel coat to keep it contained .
.
I'm following this thread closely as I have a UK Registered k0 in bits and I'm considering what's the best route to take with it..I'm slowly collecting the parts and seeing how you are marching forward at an outstanding rate is tipping me to dig it out and start it. ...or at least piece it together ...
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 20, 2015, 12:24:13 PM
Is the pan completely fubard. ...
Have you not a potion in your arsenal you could coat it with...to contain all the crud ..kind off gel coat to keep it contained .
.
I'm following this thread closely as I have a UK Registered k0 in bits and I'm considering what's the best route to take with it..I'm slowly collecting the parts and seeing how you are marching forward at an outstanding rate is tipping me to dig it out and start it. ...or at least piece it together ...

Great stuff if it's  spurring you on. I was thinking of coating THe DK one  in alumium powder filled epoxy resin on the foam side  then glass fibring  it. It's a freebie anyway now so nowt to lose I suppose. Sides are really solid.  I guess a family of rodents peeing on it didn't help  ;D
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on December 20, 2015, 02:24:29 PM
Ash where do you get your alumium powder filled epoxy resin
pete
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 20, 2015, 02:29:45 PM
Ash where do you get your alumium powder filled epoxy resin
pete

Make it myself   :)  . RS industrial 2-part epoxy kit mixed with aluminium powder .
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on December 20, 2015, 06:45:10 PM
Could this be used for fin repair?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 20, 2015, 09:05:25 PM
Yes done it Pete. You drill 1 mm holes into the fin  and bond in drill blank pins to act as reinforcement , then use the epoxy to bond the pins. Then use the putty you make from the powder and epoxy to build up the repair. Great on fins that are painted as standard. A bodge I know before someone shoots me down in flames  ;D. If you want a bit to try , let me know. Got your mob no off Rich  today , when's the best time to call?

Cheers Ash
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on December 20, 2015, 09:44:30 PM
Ash ring me anytime within reason, thats well handy to know for fin repair, i had my sandcast head fins all welded, but i had to grind back the welding and shape the fins, i done quite a good job, then i noticed the chuck on the dremel had been rubbing on some of the other fins and left a big bloody groove, so i was contemplating an epoxy repair of some sort to hide my cock up
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 21, 2015, 12:12:30 AM
Cheers Ken. I don't think its a length thing it's the hole for the wiring on the 750 and the wire brackets on the 750 See pics.

Do you think the dint could be removed without a rechrome? Can you PM me some pics and the price you would part with it for please.

cheers Ash

[attachimg=1]

[attachimg=2]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 21, 2015, 08:21:21 AM
Hi Ken, The chromer I use tells me you have to fill with silver solder or braze not soft solder. I don't think you  can chrome plate  over chrome (well as far as I know and have been told by the guy I use on bright chrome plating but I am no expert myself), you have to totally strip it. Let me know some prices on both if you are up for selling and we can take it from there.

Thanks for all your's and everyone's help BTW ... really spurring me on  :)
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 21, 2015, 04:13:48 PM
Well I know what caused the original mudguard to split, some owner in the past mounted a rear rack on the bike, I'd forgotten that at one time I had a rack on my K reg that mounted onto the rear struts but also for some reason the 2 bolts holding the rear light to the rear light bracket. I always used to carry loads of stuff in my topbox in those days and eventually the weight constantly banging up and down on the rear light split the mudguard in exactly the same way as yours.

As for silver solder, yeah that sounds like it would work. If possible knock the dent out from the other side, braze some silver solder onto the area afterwards and file/sand it smooth so you can rechrome over the top of it. You'd have to have the present chrome stripped off first I suppose to allow the solder to grip the metal but afterwards the result should be undectable.

Will have a think on prices. Not 100% sure on whether I want to sell the NOS one as I keep thinking I may just restore my L reg bike again and I've sold the rear guard that was on that to Graham, along with my set of NOS exhausts I was saving for it and my NOS seat as well, damn I've sold a lot of my parts I was saving for that bike  :'( :'( :'(


OK Ken .. I don't want to persuade you to sell your NOS stuff and then regret it ... been there done that myself  :(  .  Have a ponder and I will look around myself at the different options. I just don't want this bike to linger on like my 750K0 and so far so good on that score, provided that  the engine turns out OK and everyone is still spurring me on  ;D.  Do you have any crank shells stashed away ? Just in case I need any . Bryan has found me a gasket set and oil seals and I have a primary chain and primary cush rubbers coming from Yamiya, as luckily they are the same as in the  400/4 engine . Just wish Yamiya sold 500/4 bits !
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on December 21, 2015, 05:06:19 PM
Ash, with the mileage on that 500 I doubt it will need shells mate
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 21, 2015, 08:07:36 PM
Agree with both of you. My 400/4 had had 8 owners and 26k but the crank and shells were perfect and I left well alone. I had another 400/4 that had done 19 k and there was about 1mm play on one of the big ends. Top  end on the 500 looks good though, so just hoping  !

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 28, 2015, 07:02:37 PM
Is the pan completely fubard. ...
Have you not a potion in your arsenal you could coat it with...to contain all the crud ..kind off gel coat to keep it contained .
.
I'm following this thread closely as I have a UK Registered k0 in bits and I'm considering what's the best route to take with it..I'm slowly collecting the parts and seeing how you are marching forward at an outstanding rate is tipping me to dig it out and start it. ...or at least piece it together ...

Took your advice Woodside  :) Bead blasted the DK seat pan to remove all traces of rust,  then covered the clean side of it  in gaffer tape then filled all of the holes from the foam side, with aluminium loaded epoxy. When that cured I  covered the whole area with short fibre glass and unfilled epoxy. Then I coated the whole underside of the pan with epoxy filled with aluminium and ceramic powder and cured it all up in an oven. Now have a bloody stong seat pan that will never rust on the foam side ! Going to etch prime the non-foam side tomorrow and then satin black the whole lot. Also bead blasted the swinging arm that was in pretty nice shape .. needs new bushes/collar though ... same parts as early 750. Think I will grind the collar and make slightly undersize ID phosphor bronze bushes, like I did with my 750K0

Left my camera at work  :( so pictures to follow.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on December 31, 2015, 06:15:48 PM
You are a gent Ken ... no worries about delay. Lets see what other goodies you have to sell me for the 'package' once I get into the engine. If it helps I can always get a package pre-paid and picked up by TNT via our works account. This bike is for my personal collection of Hondas from my 'era' BTW and I don't really ever envisage selling them on .. well until I am very much  older and greyer, anyway. Just wish I could get my 750K0 together but there is always some elusive part holding me up. Was talking to UKPete about this on the phone yesterday and the 750K0 thing is definitely an unheathy, obsessive disease  ;D
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on January 01, 2016, 12:52:25 PM
Just wish I could get my 750K0 together but there is always some elusive part holding me up. Was talking to UKPete about this on the phone yesterday and the 750K0 thing is definitely an unheathy, obsessive disease  ;D

Your not wrong there ash, its driving me insane , but in a strange way i enjoy it, like the other day scoring myself a very early set of 1969 sandcast  cylinders for a bargain price, i am still well chuffed at that cause its taken me a year and a half to find them
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 03, 2016, 07:37:22 PM
Just got a reasonable best offer on this from DK,  basically for what they owe me refund of the 'mouse infested' seat they sold me. Needs some repair work and a re-chrome (est. £70)   but I was fast becoming aware that these are rocking horse poo un-cracked /solid etc

http://www.ebay.co.uk/itm/351617615441
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on January 03, 2016, 08:43:10 PM
Great find well done ash.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 14, 2016, 10:36:44 PM
Got  a NOS 'damaged' seat ... had to pay lots for this example of rocking horse poo. Just hope I can fix it.
Stayed behind at work in the freezing cold to blast clean the centre stand (pin free and no wear). Cleaned the transmission cover in the parts washer, didn't bead blast it as it's pretty good, will just strip the clear coat and redo.
Seat photo's a bit naff .. camera not focusing properly since my daughter hid it away tidying up  :(.   Padding in quilting  looks really pronounced compared with all the repros I have seen. it's the same with the repro CB750K0 seats ...only the Yamiya ones come anywhere close to the original. Why can't UK seat cover suppliers repro this correctly?

[attachimg=1]

[attachimg=2]

[attachimg=3]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 14, 2016, 11:44:59 PM
"Is it missing a round rubber Ash?"

Yes well spotted Ken .. got a few spare ones  though.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 19, 2016, 11:20:03 PM



Stripped down NOS seat . Evidence of water ingress and cover de-fused not torn/cut/ripped. Interesting that the original 3/71 cover was stitched. NOS has no stitching at all ... All heat fused or bonded  and the heat fusing/ bond interface has de-laminated. pics tell the story.

[attachimg=5]


[attachimg=1]

[attachimg=2]

[attachimg=3]

[attachimg=4]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 19, 2016, 11:31:57 PM
Attachments  gettin fked up GRRRR!

[attachimg=1]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on January 20, 2016, 06:42:05 AM
Good pics Ash, what glue will you use for the cover
pete
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Woodside on January 20, 2016, 07:19:26 AM
Good pics Ash, what glue will you use for the cover
pete

Do you mean " how are you going to make  the glue to bond it back together"
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on January 20, 2016, 07:46:00 AM
If the seat is original, it should have a decal sticker (in Japanese) on the seat pan (bottom) It will be located on the side  ;) 
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 20, 2016, 07:48:25 AM
There was a guy I was at school with who's old man had an auto upholstery place in Hull called DL Barr (bet Orcadian knows of them). He now runs the firm still with his brother, so first thing is to take it in there for advice. I think it will have been hot fused not glued and I would be very reluctant to take any glue near it, its so rare. Perhaps it can be stitched ala the original Honda one.

http://www.dlbarrandsons.co.uk/index_files/Page348.htm
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 20, 2016, 07:49:10 AM
If the seat is original, it should have a decal sticker (in Japanese) on the seat pan (bottom) It will be located on the side  ;)

It is original and it does have the Japanese sticker Graham. That's why it cost me ...

Also see photo of 'Bridgestone' foam CW one from original 3/71
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on January 20, 2016, 08:01:05 AM
Where do you get the idea it's a NOS seat Ash ?. It's obviously been fitted to a bike and sat on in the past for the cover to split and used out in the rain for the water to get in, so where does the NOS, as in new, old stock come from ?.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 20, 2016, 08:20:27 AM
Where do you get the idea it's a NOS seat Ash ?. It's obviously been fitted to a bike and sat on in the past for the cover to split and used out in the rain for the water to get in, so where does the NOS, as in new, old stock come from ?.

All terminology .. to me it's as 'New' as you will find. I know people who do have new ones in box, plus new Honda genuine pipes etc  but you will have to wait till they snuff it before they part with them. From what I was told the seat had other seats piled on it and in damp conditions.

OK it'a dealer take off then !   ;D ;D ;D ;D
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on January 20, 2016, 08:27:57 AM
Terminology ............used NOS then  ;D ;D ;D It looks like the foam was manufactured by Bridgestone Motorcycles who made a few parts for Honda M/C back in the 60's
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 20, 2016, 08:36:17 AM
Terminology ............used NOS then  ;D ;D ;D It looks like the foam was manufactured by Bridgestone Motorcycles who made a few parts for Honda M/C back in the 60's


see this Graham... can you add to list

http://www.sohc.co.uk/index.php/topic,9361.msg65262.html#msg65262

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on January 20, 2016, 08:56:01 AM
Tell me something I don't know  ;) ;)
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 20, 2016, 09:13:35 AM
Tell me something I don't know  ;) ;)

NO ...you tel us and add to the list ... it helps track down parts cheaper   ;D ;D ;D ;D
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on January 20, 2016, 04:15:08 PM
Tell me something I don't know  ;) ;)

NO ...you tel us and add to the list ... it helps track down parts cheaper   ;D ;D ;D ;D

(http://www.sherv.net/cm/emo/laughing/crying-laughter-smiley-emoticon.gif) (http://www.sherv.net/)(http://www.sherv.net/cm/emo/laughing/crying-with-laughter.gif) (http://www.sherv.net/)
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 20, 2016, 09:25:19 PM
 'NOS' (Dealer take-off :D)  CB500K0 seat Label for Trigger  ;D 46 11 24  is that   24/11/1971?

[attachimg=1]





Got my chrome stripping second batch back today back from chromers in Hull  Estimate £40-50. Guys says "What did I say on price?". I replied "Not a lot". He replied "Is £20 Ok then" ? Too 'kin right. Found a label on the job sheet... marked £40.




Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 21, 2016, 08:16:17 AM
Bead blasted them this morning ...Brrrr bl**dy cold out there. Just need to polish them now plus repairs (holes in fork ears etc)...long job !!
sneaked in 750K0 brake hose thingy over Christmas (another Honda copper base layer item)

Off to the uphosterers when he opens with the seat cover to repair...see what he suggests.


[attachimg=1]

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on January 21, 2016, 08:22:46 AM
Great progress Ash.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Sgt.Pinback on January 21, 2016, 09:08:05 AM
WOW.

Is that chain adjuster in the pic from a CB750 KO or is it the same on the CB500 KO ?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 21, 2016, 09:41:42 AM
WOW.

Is that chain adjuster in the pic from a CB750 KO or is it the same on the CB500 KO ?

Its from my  10/69 diecast 750 K0 . The new ones I got from David Silver in 2009 are superseded parts and wrong. Brake clip and exhaust collars are from 750 too.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 21, 2016, 09:48:55 AM
Just got the seat cover sewn at DL Barr & Sons (Uphosterer & trimmer) in Hull £5
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Sgt.Pinback on January 21, 2016, 09:52:38 AM
Regarding solid chain adjuster:

My 16.0xx diecast has them too.

Do you know until which VIN they used them?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 21, 2016, 10:20:29 AM
Not sure Uli .. I will check

Somebody is fetching my metal covered suppressor caps over to the UK  from Germany next week ..he is based in  Kornwestheim, is that anywhere near you?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Sgt.Pinback on January 21, 2016, 12:35:32 PM
15 min ......

But what is/are " fetiching metal covered suppressor caps" ?

That?:
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Nurse Julie on January 21, 2016, 03:09:52 PM
Just got the seat cover sewn at DL Barr & Sons (Uphosterer & trimmer) in Hull £5
That was a bargain Ash, did it come up alright?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Orcade-Ian on January 21, 2016, 03:17:20 PM
Is that the same D Barr who used to be Don Barr coach trimmers?  I had quite few vinyl roofs sewn by them in the 70's - always a fantastic result for little money. They also did a dual seat cover for my Gold Star.  The old man Don can't be still around, surely?  Perhaps his Son runs it now.
Ian
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 21, 2016, 03:53:57 PM
Is that the same D Barr who used to be Don Barr coach trimmers?  I had quite few vinyl roofs sewn by them in the 70's - always a fantastic result for little money. They also did a dual seat cover for my Gold Star.  The old man Don can't be still around, surely?  Perhaps his Son runs it now.
Ian

Ian.

Yes the same trimmers .. was on Pulman Street now on Wiltshire Road . It’s run by Don’s Sons Paddy & Andrew …I was at school with Paddy & Andrew was the year below. Not seen Paddy since the seat was manufactured !   Pretty sure Don is no longer around.

Uli:
“But what is/are " fetching metal covered suppressor caps" ?

Yes those caps 2 sets of four are for my  UK Cb750K0 & UK Cb400F  (don't tell Oddjob  :-[ :-[) … got them from a German guy who would not ship to UK so I am getting our partner Wolfram from  ‘Krish-Dienst’ to fetch them over. I have both the 'cranked' ones in your picture plus the straight ones.

Julie : Will let you know when I fit it back to the seat. It looks pretty good but you never know and my history on seats is not good!

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Sgt.Pinback on January 21, 2016, 04:06:36 PM
[
 … got them from a German guy who would not ship to UK so I am getting our partner Wolfram from  ‘Krish-Dienst’ to fetch them over. I have both the 'cranked' ones in your picture plus the straight ones.


Can help you next time if you want.

I too just bought a set NOS here (real bargain....)

http://www.ebay.de/itm/Honda-CB-750-Four-Kerzenstecker-Satz-neu-Original-/201482161408?hash=item2ee945cd00:m:mBrQ8_NVYIkzjguJ6lGH8Pw
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 21, 2016, 04:15:14 PM
[
 … got them from a German guy who would not ship to UK so I am getting our partner Wolfram from  ‘Krish-Dienst’ to fetch them over. I have both the 'cranked' ones in your picture plus the straight ones.


Can help you next time if you want.

I too just bought a set NOS here (real bargain....)

http://www.ebay.de/itm/Honda-CB-750-Four-Kerzenstecker-Satz-neu-Original-/201482161408?hash=item2ee945cd00:m:mBrQ8_NVYIkzjguJ6lGH8Pw

That's where I got two sets from Uli ,  they are tons more at the other place in Germany who sells them  on eBay.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 21, 2016, 04:16:29 PM
Here are the pics of the repair  Julie

[attachimg=1]


[attachimg=2]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Nurse Julie on January 21, 2016, 04:45:32 PM
Here are the pics of the repair  Julie

(Attachment Link)


(Attachment Link)

That looks very good Ash
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Sgt.Pinback on January 21, 2016, 07:36:01 PM
Well done. That should last.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on January 31, 2016, 08:17:21 PM
Slight stall in progress finishing my Tax Return for the deadline .Yawn. ::)
Taking 4 days of end of next week /week after to hawk round my Chroming/Zinc plating etc. plus work on the engine. Tank /side panels winging their way to Menno. 16 quid to Germany delivery inc. insurance MyHermes Int. MASSIVE thanks to Bryan for selling me a NOS Candy Jet Green RH side panel & advice generally. Gave the repaired one away to a mate in York who just bought a 500K1 from DK. Put pipes on Fleabay.
Stripped paint and bead blasted the centre stand.. pivot pin free and can be reused.

[attachimg=1]

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 17, 2016, 05:12:53 PM
 Started stripping the engine today and not looking brilliant at all   :( :( ... rockers and cam journals/head look fine  but pitting on two cam lobes, that I didn't notice on first inspection .. had it in daylight today. I may know someone (not on forum) that may have a camshaft to sell. One bore has a significant ridge at the top so looking at rebore etc or second hand barrels/pistons. So another engine money pit like the CB750K0 ! by the sounds of it. Don't know what horrors I will encounter  in bottom end. I freed all of the cover screws etc (looks as if never stripped down previously) and taking to work Saturday to strip the bottom end in the warm.

Weirdest looking aftermarket points plate and points sets I have ever seen on a Honda. Points look like they are off a British car. will post pics when I have some.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on February 17, 2016, 05:14:50 PM
Bollox. Now I feel shitty.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 17, 2016, 05:25:10 PM
Bollox. Now I feel shitty.

No need mate ... its always a gamble .. The 500K1 '3k miler' my mate got from DK last month ...didn't have a speedo inner cable in it !

This pic will make you chuckle ... look at the capacitors too .. straight out of Radio Shack !

[attachimg=1]

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on February 17, 2016, 06:20:51 PM
Crikey, you could probably contact the space station with that lot.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on February 17, 2016, 06:57:29 PM
Started stripping the engine today and not looking brilliant at all   :( :( ... rockers and cam journals/head look fine  but pitting on two cam lobes, that I didn't notice on first inspection .. had it in daylight today. I may know someone (not on forum) that may have a camshaft to sell. One bore has a significant ridge at the top so looking at rebore etc or second hand barrels/pistons. So another engine money pit like the CB750K0 ! by the sounds of it. Don't know what horrors I will encounter  in bottom end. I freed all of the cover screws etc (looks as if never stripped down previously) and taking to work Saturday to strip the bottom end in the warm.

Weirdest looking aftermarket points plate and points sets I have ever seen on a Honda. Points look like they are off a British car. will post pics when I have some.

This is why I never give a price on a engine re-build until I have stripped it and assessed what is needed  ;) I have always found that a USA unit is always has more internal wear than UK units. I put this down to PO being lazy with servicing as the German units are always spot on internally.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 17, 2016, 08:55:03 PM
Started stripping the engine today and not looking brilliant at all   :( :( ... rockers and cam journals/head look fine  but pitting on two cam lobes, that I didn't notice on first inspection .. had it in daylight today. I may know someone (not on forum) that may have a camshaft to sell. One bore has a significant ridge at the top so looking at rebore etc or second hand barrels/pistons. So another engine money pit like the CB750K0 ! by the sounds of it. Don't know what horrors I will encounter  in bottom end. I freed all of the cover screws etc (looks as if never stripped down previously) and taking to work Saturday to strip the bottom end in the warm.

Weirdest looking aftermarket points plate and points sets I have ever seen on a Honda. Points look like they are off a British car. will post pics when I have some.

This is why I never give a price on a engine re-build until I have stripped it and assessed what is needed  ;) I have always found that a USA unit is always has more internal wear than UK units. I put this down to PO being lazy with servicing as the German units are always spot on internally.

Yes I agree Graham on US bikes.. on the twins you rarely see an unpitted cam in the USA on really low milers  but I ran them for years and changed the oil and they always stayed unworn. My 400/4 had done 28k but everything was pristine inside but I got NOS barrels so I fitted then ..waaaay back.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 18, 2016, 12:23:06 PM
Ash I have a genuine Honda points base plate complete with wires and points etc lying around. If you want it you can have it, I'll include it with the front disc when I send it, still waiting on that one as I think maybe you'll need some more parts and cheaper to send them all together.

Cheers Ken..will be in touch as soon as I have stripped the bottom end
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on February 18, 2016, 07:28:41 PM
i hope the bottom end is a lot better ash
pete
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 20, 2016, 04:05:38 PM
You can come out of hiding James, the bottom end looks pretty good  :) :). Not measured anything yet but no horrors in there. No metal in sump.

Only sadness is my man with the magic micrometer hands died suddenly last summer. RIP Alan .. sure you are up there watching me.

Barrels were a bit of a tw*t to get off but my old mate Bryan on here put me straight on that one.

Here are some pics.

[attachimg=1][attachimg=2][attachimg=3][attachimg=4][attachimg=5]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on February 20, 2016, 04:08:24 PM
What is with all the war paint ;D
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on February 20, 2016, 04:11:57 PM
Thats great news ash, honda bottom ens seem to be quite robust
pete
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on February 20, 2016, 04:27:32 PM
Looking at those bits, especially the tensioner that engine has done sod all miles mate, you said one bore had a ridge silly question but was it wear or just a carbon ridge?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 20, 2016, 06:32:04 PM
Looking at those bits, especially the tensioner that engine has done sod all miles mate, you said one bore had a ridge silly question but was it wear or just a carbon ridge?

 No its definitely a proper ridge mate but the pistons look OK.  BTW loads of people on here have been bloody marvelous giving me sound advice but I must say you have been an absolute diamond to me Bryan.

A guy in Germany is breaking a couple of 500's and is looking to see if the barrels are OK on any of them.

I just love the design of that 500 engine plus seeing some old friends from my CB250's in there like the shift drum (have a NOS one of them to put in it if needed). Took my trusty home made ,in 1980, peg spanner in to work today ...... as used on CB750,CB175,CB250 etc but not needed on the 500 after all that. Used a CB250  brake lever spindle/bolt to extract the primary chain shaft whatever its called.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on February 20, 2016, 08:48:24 PM
Looking good ash. Happy days.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on February 20, 2016, 09:40:48 PM
I have several sets of cylinders but condition unknown mate
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 21, 2016, 11:15:55 AM
Everything looking  OK APART from the cage of the 20mm needle roller which is toast and the needles are slightly scuffed. It's the same part as CB250/K a  ---286---  part No. Luckily I have a spare 250K4 gearbox with decent 20mm bearing in it and the 500 shaft surface finish looks fine.. The bearing is branded Koyo on the 250 and different design of needle cage. It's unbranded on the 500K0 .The bottom end has never been apart before on the 500. Is this a known issue with the 500K0 gearbox?

Unfortunately the mega cheap GENUINE Honda 400/4 20mm needle roller bearing from Yamiya is open construction but possibly the rollers and cage could be swapped. Literally loads of CB250/350/CL350 gearboxes out there though. centre gear selector and selector shaft both the same as the CB twins too.

[attachimg=2][attachimg=3][attachimg=1][attachimg=4]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on February 21, 2016, 12:06:58 PM
Have come across this problem with the needle roller on a couple of the early 500K0 engines. Check to see if you have these parts fitted : oil guide plate 23106-323-000 and bearing plate 23102-323-000. The ones I had needle roller problems never had these fitted.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 21, 2016, 01:06:39 PM
Have come across this problem with the needle roller on a couple of the early 500K0 engines. Check to see if you have these parts fitted : oil guide plate 23106-323-000 and bearing plate 23102-323-000. The ones I had needle roller problems never had these fitted.

Got the 2nd item Graham as I remember taking it off yesterday. Didn't see the first one though, pretty sure the engine doesn't have it fitted.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 21, 2016, 01:19:34 PM
This is for anyone who doesn't already know this  CB250 & 400/4 parts on CB500K0. There are also a few small parts that are CB450 and c72 CB72 parts too.

400/4 parts are available from Yamiya but sadly they don't do parts for the 500.

[attachimg=1][attachimg=2][attachimg=3]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on February 21, 2016, 02:40:38 PM
Have come across this problem with the needle roller on a couple of the early 500K0 engines. Check to see if you have these parts fitted : oil guide plate 23106-323-000 and bearing plate 23102-323-000. The ones I had needle roller problems never had these fitted.

Got the 2nd item Graham as I remember taking it off yesterday. Didn't see the first one though, pretty sure the engine doesn't have it fitted.

If the oil guide plate is not there Ash, you were lucky to get away with just the bearing. I have done a couple that the needles have got so hot that they were burnt and the shaft had to be replaced. The oil guide plate holds the oil long enough to lube the roller bearing.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 21, 2016, 03:17:37 PM
Have come across this problem with the needle roller on a couple of the early 500K0 engines. Check to see if you have these parts fitted : oil guide plate 23106-323-000 and bearing plate 23102-323-000. The ones I had needle roller problems never had these fitted.

Got the 2nd item Graham as I remember taking it off yesterday. Didn't see the first one though, pretty sure the engine doesn't have it fitted.

If the oil guide plate is not there Ash, you were lucky to get away with just the bearing. I have done a couple that the needles have got so hot that they were burnt and the shaft had to be replaced. The oil guide plate holds the oil long enough to lube the roller bearing.

The guy in York who advised James and then me on the early case VIN's reckoned that there was an inherent gearbox problem that probably 'saw off' a lot of those 1st issue bikes. Maybe that was it Graham? It just proves that with these old bikes that it's prudent to give the engines a full strip down just to be on the safe side. I suppose with a 2-stroke that goes without saying but a lot of people I think believe you can just get a low miler 4-stroke  import from DK, ultrasonic the carbs and away you go. That camchain tensioner with PTFE pad slipper on the guide looks like the best design of tensioner I have seen on a Honda. Or does it have it's own problems?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on February 21, 2016, 04:30:16 PM
Whilst it may not be original you are better off with the later location pin for the drum and the later neutral and gear location rollers behind the clutch, and that was all part of a recall by Honda. Would you like a copy of the bulletin?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 21, 2016, 04:38:38 PM
Whilst it may not be original you are better off with the later location pin for the drum and the later neutral and gear location rollers behind the clutch, and that was all part of a recall by Honda. Would you like a copy of the bulletin?

Yes please Bryan.. I will definitely take action on that if it was a recall.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on February 21, 2016, 05:20:57 PM
Just because a bike was on a recall, not everyone took them. And I found that because the 500K0 was never sold in the UK (as Honda have stated  ??? ) non of the UK 500K0's had a recall notice issued.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on February 21, 2016, 05:29:50 PM
Should be 4 pages, probably upside down but no time b4 going work to sort out
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 21, 2016, 06:18:15 PM
Cheers for that Bryan I will print and have a read.

You are correct Ken it's the one on the end of the countershaft and it's 20mm as opposed to 22mm on the other location on the other gear cluster shaft and yes one has different cage construction to the other. Both CB250 And CB500 countershaft bearings are listed as the same part No  but different needle cage construction on the examples I have looked at 'in the flesh' . Could it be Honda deviated from the normal bearing vendor and used a different manufacturers bearing to the normal Koyo one (Koyo on the 250K4) and it was prone to failure but still the same Part No.? I was planning on fitting the Koyo CB250 bearing as its from a really low mileage CB250K4. Not sure on what Graham states as you guys are the experts on these engines... it's all new to me ! I will definitely fit that extra part that is not in my engine though but  I also need to read Bryans SB's.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 21, 2016, 06:27:58 PM
I guess this is the SB kit Bryan.

http://www.ebay.co.uk/itm/HONDA-06241-323-000-CLUTCH-AND-SHIFTING-MECHANISM-MOD-KIT-CB500-NEW-NOS-/321209689797
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on February 21, 2016, 06:32:23 PM
Are you getting confused here Graham? the bearing which has disintegrated is one of the end caps from the gearbox yet the oil guide plate you refer to is fitted to the primary shaft, nothing to do with the gearbox at all.
I know the guide plate was the mod fitted to the later K0 and K1 engines and as such is worth mentioning in it's own right but not sure why you'd think the lack of it caused the gearbox bearing to fail.

Ash, I gather the bearing is off the countershaft as it looks like it, Honda did alter the design on this bearing for the CB550 engine by incorporating a small oil pump inside it, maybe this was because they had reports of the bearing failing due to lack of oil, would account for why they felt the need to fit the oil pump in there. Also I seem to recall that one of the 2 needle rollers has the rollers trapped inside the cage whereas the other had loose rollers which had to be assembled inside the cage whilst it was sat in the outer housing, no idea why Honda used two different designs for what is essentially the exact same job. I have both of these NOS along with 90% of the gears and both shafts as well, just missing 3 of the gears for a complete NOS gearbox.

Check the fork selector tips for burning or burring as well, they are pretty hard to find new or even in decent condition second hand.

I'll probably have a lot of the parts you need in a bin somewhere but whether I can put my hands directly on them is another matter.

I think you maybe right there Ken, I can not remember what parts you sent me now (too many engines ago) I know that the oil guide plate was missing on two of the 500 K0 engines that I built and one was that bad on the roller bearing that I needed to replace the shaft. Which, I think you sent me.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 21, 2016, 06:40:19 PM
Guess this is the mod on the 550 Ken.. Sure learning a lot today ...My brain hurts !

[attachimg=1]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on February 21, 2016, 06:48:34 PM
Are you getting confused here Graham? the bearing which has disintegrated is one of the end caps from the gearbox yet the oil guide plate you refer to is fitted to the primary shaft, nothing to do with the gearbox at all.
I know the guide plate was the mod fitted to the later K0 and K1 engines and as such is worth mentioning in it's own right but not sure why you'd think the lack of it caused the gearbox bearing to fail.

Ash, I gather the bearing is off the countershaft as it looks like it, Honda did alter the design on this bearing for the CB550 engine by incorporating a small oil pump inside it, maybe this was because they had reports of the bearing failing due to lack of oil, would account for why they felt the need to fit the oil pump in there. Also I seem to recall that one of the 2 needle rollers has the rollers trapped inside the cage whereas the other had loose rollers which had to be assembled inside the cage whilst it was sat in the outer housing, no idea why Honda used two different designs for what is essentially the exact same job. I have both of these NOS along with 90% of the gears and both shafts as well, just missing 3 of the gears for a complete NOS gearbox.

Check the fork selector tips for burning or burring as well, they are pretty hard to find new or even in decent condition second hand.

I'll probably have a lot of the parts you need in a bin somewhere but whether I can put my hands directly on them is another matter.

I think you maybe right there Ken, I can not remember what parts you sent me now (too many engines ago) I know that the oil guide plate was missing on two of the 500 K0 engines that I built and one was that bad on the roller bearing that I needed to replace the shaft. Which, I think you sent me.

Yeah I sent you the oil guide plate and probably the primary shaft roller bearing as well, was some time ago. I may have another one Ash if your desperate, I'll certainly have the neutral selector mechanism as I remember it sat in an old clutch casing along with a complete clutch. Don't think I sent that to you did I Graham?

No clutch parts or selector mechanism Ken, I think it was a roller bearing, the housing, a few small parts and a shaft mate.  Think I may have some dog legs in good condition that came from a CB350 or something like that.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Woodside on February 21, 2016, 07:13:23 PM
Saw this and thought of you

http://www.ebay.co.uk/itm/NOS-Honda-1971-1973-CB500-Four-COMPLETE-SHIFT-CLUTCH-KIT-06241-323-000-/252275993307?hash=item3abcd22adb:g:~kEAAOxy69JTGe6G
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 21, 2016, 07:54:00 PM
I think the good thing is that this is all going on in the clutch area  so am i right in thinking that so long as I fit a decent countershaft 20mm needle roller bearing , everthing else can be sorted without further engine removal?

This bikes not going to cover loads of miles and has done 22k at least already so perhaps I can just assemble and gather the uprated parts, as and when. I don't  want it to be another 750K0 and I want to keep the momentum going.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on February 22, 2016, 07:39:25 AM
Yes Ash, as long as the internal bearings are all OK the selector mechanism can be sorted out later.

I do not know why Honda put a clutch cover in the "Kit" unless there is some sort of casting mod on the inside but later covers are(were) relatively available as are the detents and if you fit the engine to frame without clutch or cover fitted it can all be done afterwards.

DO NOT fit engine without the generator cover attached as it is all that holds in the main gallery blanking plug and should you turn the engine over to circulate oil you get a big puddle plus a laborious search for a plug that has disappeared and is not magnetic---Yes I have got that T shirt!!!
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on February 22, 2016, 10:51:57 PM
Parts books and manuals wrong, I wonder why I have never used them ;D ;D ;D
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 23, 2016, 12:24:52 AM
Well got in from pub and measured both shafts as 20mm so yes you are correct  Ken not the same type though different outer housings and cage design for needle retention. So both bearings are 20mm and both are 20mm on CB250/350k  gearbox too.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 27, 2016, 11:31:58 AM
Plenty of progress but all boring stuff like trying to hone the old bores and see if they come up to scratch, cleaning crankcases etc

Got quite a few parts on order from Yamiya that are common to the  400/4 and CB750 (Hyvo primary chain and dampers, bearings etc.)

Also fixed the drill on LHS for a tenner and a bust  iPad Air I was given free , for a tenner... so joining you James with the new technology  ;D The bit of wood in the drill is  used  to get into awkward corners on the crankcases whilst cleaning in the parts washer.


[attachimg=1]

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 27, 2016, 01:27:05 PM
Works part washer Ash or your own?

Looks like the one we had at Queenies and TBH I'd like to find one for myself as I intend to built myself a self contained workshop with parts washer and bead blaster incorporated.

Does it sit on a 56 gallon drum? and who's make is it. Just so I can see if the spec is suitable for my needs. Might be AC instead of DC for instance.

Will get a better pic Ken  .. its 240v AC and at work. We have 2 .... one that's used for mucky stuff .... one for cleaner stuff . I thinks its on hire/lease they come every month with the smelly stuff. We do have an aqueous one too  but it's for nuclear jobs so I cant use it ... just use Cathy's dishwasher instead when she's out  ;D  that's between you and me BTW Julie when you meet her !
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Woodside on February 27, 2016, 01:42:01 PM
Hi ash
Do you know what solution they use in it...
I got given a parts washer but never really knew what to put through it...
I plumped for kerosene in the end as I drained it out of a tank that was no longer required on a job we were on..so it was free....works ok but leaves it oily after so always needs a blast off with brake / clutch cleaner afterwards to remove residue
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 27, 2016, 02:16:25 PM
Will find out but it bloody reeks and you stink of it for ages afterwards. I was told it was kerosene but never actually checked.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on February 27, 2016, 02:50:49 PM
Parts wash years ago use to be Safetykleen, and it used Jizer. These days they used some water base cleaner that is shite. Kerosene is OK for internal parts but, a nightmare on cases.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 27, 2016, 02:56:12 PM
Going to hot tank them in my ultrasonic cleaner anyway at max temperature .. That way they will be squeaky clean to take new paint Parts washer was to get the main crud off.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on February 27, 2016, 03:10:30 PM
Does that take off all the old paint and varnish Ash ?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on February 27, 2016, 05:04:23 PM
Does that take off all the old paint and varnish Ash ?
Doesn't remove paint or varnish but it removed any oily contaminants left from the parts washer. We used to have Safety Kleen at work  but pretty sure it was paraffin or some brew other than Jizer. As Jizer emulsifiers when wet. Yea good stuff Jizer and Gunk but not sure if it's still sold in the same formulation as yonks  ago.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 12, 2016, 01:28:04 PM
Been busy prepping BZP parts for 5 of my resto bikes. 1st batch ready to pick up from Allenchrome in Pocklington. Taking the second batch on Thursday. Nice guys to deal with.

Cleaned up the frame firstly with water and detergent. then into the degreaser then rinsed and dried. I was going to then apply paint stripper but undecided as there is little corrosion. I experimented with the bead blaster by fitting the rear part in and then 'sealing' the door area with blankets. Not ideal but I can probably come up with a  suitable framework/covering. Anyway I managed to selectively bead blast the rear top shock mount and seat hinges.  Silvers tell me that on their 400/4 restos, where the paint is pretty good, they leave the good areas  and spray on top. I don't want to powder coat this bike but I have nothing against it really (My 750K0 is powder coated).  Any ideas on the best way to proceed? Do I strip the whole lot or do what DS do?

Pics of the degreaser for Oddjob and compressor that feeds the bead blaster.

Menno tells me that my paint may will be ready next week.

Got my set of pattern pipes from DS and on first inspection they look really nice (see separate posting with pics & fitting instructions).

I started honing my bores but decided I will take them to my mate who has a lot more experience than me.

[attachimg=1][attachimg=2][attachimg=3][attachimg=4][attachimg=5]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 12, 2016, 01:31:02 PM
More pics.

When I got the DS pipes I spotted he had kickstart gears NOS for £10 so I bought one.

Compair compressor feeds the bead-blaster at work.

 The de-burring station is a bench grinder with two grades of Scotchbrite wheels ...great for cleaning parts.

[attachimg=1][attachimg=2][attachimg=3][attachimg=4][attachimg=5]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 17, 2016, 09:51:21 PM
Spent ages cleaning up parts for replating on my 5 'Project' bikesover the last two months. Took 2nd batch for BZP today and picked up the first batch ... cost £50 and probably one of the best fifty quids worth I have spent on my bikes. 

Dropped off 3 rims (F&R CB500K0 and one CB250 rear)  at a new chrome platers I have found on the outskirts of  Leeds. BZP was done by AllenChrome in Pocklington, just outside of York ...bloody nice people to deal with  :). The guy there is chrome plating smaller parts  for me (kickstart gear lever, exhaust clamps etc. etc.) that I have had stripped in a chrome bath and polished myself, so we will see how that pans out. Going to take him loads more chroming to do over the next few weeks

FIRST BATCH OF BZP

[attachimg=1]


SECOND BATCH TO BE PLATED BZP


[attachimg=2][attachimg=3]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: yozzer74 on March 17, 2016, 11:38:35 PM
Did all that coat 50 quid .?? I defo had my pants pulled down with the little bit of chrome I had done .
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: GiannisFour on March 18, 2016, 06:13:16 AM
Nice!  :)
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on March 18, 2016, 06:57:36 AM
Ash if the paint on your frame is good you could rub it down an spray over it, nice work btw, where the feck do you find the time to keep doing all this
pete
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 18, 2016, 07:02:18 AM
Did all that coat 50 quid .?? I defo had my pants pulled down with the little bit of chrome I had done .

The top photo is the 50 quids worth batch that was Bright Zinc Plated (BZP) NOT chrome (nipples and contact breaker plates were gold passivated and the rest were clear passivated).. The bottom set in tubs etc. are what I have there for plating, at the moment. I stripped all of the zinc and prepped them myself though with my magic brew , caustic Soda , EDTA , trietholamene (all available off eBay) @ 70°C in a slow cooker (Don't worry it's safe to eat at my place again as I bought the missus a new one ... which like the old one has never been used   ;D ;D)
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 18, 2016, 07:04:42 AM
Ash if the paint on your frame is good you could rub it down an spray over it, nice work btw, where the feck do you find the time to keep doing all this
pete


That's what I was thinking Pete as that's what DS do I think on their 400/4's. May selectively bead blast small areas of rust.

Whilst my wife is in 'Play' mode ... if she's writing plays/arranging their performance I can do what the hell I like as she goes into a luvvie trance  :) Also it was taking Bitsa's caustic advice .. get on with yer fr*ggin bikes mate and stop waffling  ;D
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 18, 2016, 07:32:36 AM
Just bought this off ebay NOS Genuine... He has another one if anyone needs one .. half DS price for Genuine

http://www.ebay.co.uk/itm/Honda-CB500K-CB550K-CB500F-CB550K-14520-323-000-cam-chain-guide-tensioner-/231879910062?hash=item35fd1ea2ae:g:-8oAAOSw~OVWwgqV
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 20, 2016, 12:23:25 PM
I foolishly tried to remove the front brake caliper bleed nipple without applying any heat, when I first stripped the bike and it sheared off flush with the alloy caliper housing   :-[ :-[ :-[ :-[  plus the piston was stuck solid  and I couldn't get it out. I MIG welded a blob onto the top of the remains of the nipple and then gradually built up the weld to a bigger blob then clamped the blob in a vice and it came out no problem. I used this method on a broken off crankcase stud on my 750. I made up an crude adapter to apply up to 160 bar water pressure using a test rig at work but someone had nicked the power supply that runs it,  so I just heated up the body of the caliper with a MAP gas burner and whacked the caliper onto a flat steel plate and the inertia of the piston freed/ moved it out. I then clamped a tool clamp on the insides of the piston bore and pulled the piston out. Like ever other Honda brake caliper  piston I have ever removed from a bike left for  yonks, the piston is  badly pitted and need replacing along with the seal but the caliper body is fine.

[attachimg=1]

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on March 20, 2016, 02:01:33 PM
Nice result in the end Ash...
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on March 20, 2016, 02:28:22 PM
Dont tell anybody Ash but i have had to re fit worse than that for customers who insisted, but only on those i didn't like
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on March 21, 2016, 06:08:06 PM
I got an f1 caliper that needs the same treatment, i will give it a go
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 28, 2016, 10:06:48 AM
A few years I spotted a Candy Green tank in a real Honda aficionados garage when I was looking at his sandcasts and I though wow , one of these days I am going to get  a 500 in that colour and that's what Menno is painting my set with (it's it's original colour anyway) But looking at James's Gold 500K0 I really like that too. The tank that Menno is painting is a spare one I got with bike 'cos the original one was absolutely disgusting inside. However, over the last week, I stripped the original tank and I bunged two tubs of caustic soda from the pound shop in it and a kettle full of boiling water . Fk me it was like something from a Frankenstein movie with all the heat,  hissing and gurgling but turns out the tank had been lined and my 'brew' stripped it out ...it looked like a load of seaweed when I pulled it out. that tank now looks  the most dent free tank I have ever seen for a 45 year old bike. Think I might get it painted as a spare in Gold by Menno once I have got my resto's done then I can swap over as the mood takes me.  Still love the green though. Funnily enough, the earliest model I know of from Honda with candy paint is the 1967 SS125A but the candy paint was on the frame, not the tank etc !

No before pics but ask James what that tank looked like inside pre-treating it.  ;D

A nice easy one for you Menno when you get it to do (I would think in the Autumn)

[attachimg=1][attach=2][attachimg=2][attachimg=3]


Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on March 28, 2016, 10:08:15 AM
Holy shit balls. I want it back ha ha !
Title: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on March 28, 2016, 10:23:10 AM
What did you use to strip the exterior?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 28, 2016, 11:00:20 AM
What did you use to strip the exterior?


Its the stuff in the larger tin James ... 20 quid at autojumble knocked down from £25. I said to the woman selling it ..how do I know it will work OK and she replied " I will guarantee it  works great , as I sold a tin to my daughter,  that  she 'treated' her ex husband's car with to get back at him for being unfaithful". Hell hath no fury like a woman scorned and all that !

The stuff in the 1 litre can is just as good but around 7 quid at autojumbles. All Methylene chloride based.

Seaweed stuff is out of the tank !

[attachimg=1][attachimg=2]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on April 09, 2016, 07:42:55 PM
When I was at school I had a Saturday job at a supermarket (saved up 15 quid to buy my 1st bike a Honda C200 (all frame no engine) ) and the old warehouse guy there detested, as he called it 'double handling' (doing a job twice). Had a bit of de-javu when I opened my shed up to find Keith on here his K7 shocks and found that the two CB250/350 frames I cleaned up last year were corroding badly. So rigged up a tent around the end of the bead blaster to extend it  and had to clean them up again. Plus made myself a rear shock compressor tool. So no progress on the 500K0 I am afraid. I blame the corrosion on the b*stard crabby Polycell paint stripper (the funny smelling white stuff ... thats shite).

[attachimg=1]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on April 15, 2016, 11:16:14 PM
Got my CB500/4 K0 paint set back from Menno today in Candy Jet Green .. Superb job ..certainly comes highly recommended from me as well as James. Price very competitive with my man in the UK .. in actual fact almost exactly the same and both do a superb job and both guys are great to deal with. Menno definitely has the edge on turnaround though.

Got a second tank/panel  set I am going to have done in Gold as a 'second set of clothes' probably have it done back end of this year.

Now have most of the BZP parts back looking cool and both rims rechromed in Leeds (see separate post) . Got some NOS Genuine piston rings via eBay ... forum member too ! Want to keep the momentum up on this bike to get it finished ASAP. Not going to be any progress for a week though as I have a big work related job to do . BOO HOO   :'( :'(
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on April 16, 2016, 08:53:28 AM
Nice one ash, i have a bodywork set to do as soon as i get the spare cash i will send off to meno, might give your chrome guy some stuff as well, its all about money with theses bloody bikes, mine have skint me,
pete
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on May 22, 2016, 08:35:23 PM
Too many  weekends away,  plus stripping my CD125A to get it's parts in the resto queue has stalled a bit but determined to get this bike done this summer.

I restored the original drilled disc so I could do a swapsie with my mate in York for his disc from his ex- DK 3k miler 500K1 that he's going to sprint at the IOM. Both have got zero scoring so we are mutually happy with the deal.

He's also agreed to swap my new front guard stays for his but I need the rubber grommets and steel spacer washers (any condition as I can re-plate),  if anyone has any to sell me to convert from 750 style to his 500 (see pic).

[attachimg=1][attachimg=2][attachimg=3]




Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on May 22, 2016, 09:19:43 PM
Ash, you looking to source the stay spacers / grommets to give to him. You won't need them on your K0 as it has the smaller 8mm holes?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Trigger on May 22, 2016, 09:23:09 PM
I am a little confused about the stays  :-\
750 and 500K0 are 8mm holes in the stays, no rubbers or spacers. Just a bolt and washer ;)
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on May 23, 2016, 01:49:14 PM
I am a little confused about the stays  :-\
750 and 500K0 are 8mm holes in the stays, no rubbers or spacers. Just a bolt and washer ;)

The ones on his 500 K1 have the smaller holes but the new front guard I got is for a 750 and I am told it's identical to the 500 apart from the stays have larger holes for the spacers and washers. As he's sprinting it he says I can basically swap over whatever I want, within reason. Typical DK bike though ..fannied about with, supposed  3k original  miles but no inner in the speedo cable !

At  weekend stayed overnight  & saw his CB750K1 he got from Summerbud with Lesters on it (bargain) and he just got a Kwak '71 H1 500 project  that looks another  bargain to me .. included paintwork done by Dream Machine and lots of work done and then abandoned. I suspect hes going to sprint the Kwak and the CB500K1 is going to go down in the queue and he seems to be getting more and more peed with it. It 500K1 refuses to fire on one centre cylinder. Had a quick look myself , checked the coils and caps and plug and all fine. Squirted some Easystart down suspect cyl carb and it coughed into firing a bit and heated the pipe so suspect carburation but he's adamant he's ultrasonicaly cleaned them. Problem is, No filters on it and horrid sidewinder pipes plus he's running off the tank as he got it from DK. Mucky watery petrolly liquid peeing out of suspect cyl silencer. Said if he can't sort it he can try my carbs, once I have cleaned them out. Also he's borrowing a compression tester and told him to make sure no valves are  stuck / tappets set correctly. Any other ideas you 500 gurus?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on May 23, 2016, 02:03:06 PM
Def sounds like carbs to me Ash...
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on May 23, 2016, 02:13:06 PM
Def sounds like carbs to me Ash...

Yea that's what I thought. Think I would have at least had the top end off though to inspect it. He did take the cam cover off and it was pristine.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: K2-K6 on May 23, 2016, 07:14:34 PM
Does sound like the carbs, you could try running a fine bore tube from the vacuum gauge port on that carb to an open pot of petrol (only small in size)  to see if it'll suck fuel and so bypass that carb's jets to see if it'll run on all four.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Johnwebley on May 23, 2016, 07:51:29 PM
a couple of months ago I stripped my carbs to do a cruzimage part overhaul,

 if you disturb the slides,its important to check all slides open at the same time,I had similar symptoms and took me ages
to getting it running well again
  I mounted the bank of carbs in/on a workmate type bench,then using the throttle stop screw and a torch,I lowered all the slides,

 shine the light through the carb (s) and chech they open together,I expect you will find is lagging,

  hope it helps,of course the motor runs ok ish above 2,000 rpm with iffy carbs.



but sounds like a bag of spanners close to tickover
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on May 24, 2016, 09:10:17 AM
Def sounds like carbs to me Ash...

Yea that's what I thought. Think I would have at least had the top end off though to inspect it. He did take the cam cover off and it was pristine.

Yesterday, he swapped two of the carbs over and the fault transposed then he found that one main jet had been drilled out with a massive hole. I bet DK just bunged a random set of carbs on it, as it had no airbox etc and the carbs had obviously been off. He's ordered 4 repair kits.  You just have to treat some of  these dealer import bikes as a cobbled together set of parts. Lots of them look like they have been in desert scrapyards for yonks and the the likes of DK tart them up with random bits to look more like a full bike. The thinkg is they give you loads of photos and you need to decide yourself if it's worth it. He now hates DK, I don't mind them myself  as they do have some real bargains sometimes.

Cheers for the advice...sorry to hijack my own thread  ;D ;D.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on June 19, 2016, 09:40:40 AM
Been busy cleaning up and  satinizing the fork lowers (like original Honda ones were surface finished) on all of my projects including this 500K0 (apart from the 400/4 & the CB175) So that's 12 fork lowers to do   :'( :'( :'( :'(. I have set myself a task of a leg a day and so far so good. Luckily I had a NOS set of CB250K0 forks to replicate the finish from. Unfortunately, although NOS, they had a couple of chunks out of them so still needed the full works. Bought some Eastwood Diamond Clear coat to re-lacquer but not tried it out yet.

Still waiting for Yamiya bits from Japan to rebuild the engine ( primary chain & dampers, primary ball bearings  & needle roller bearing )
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Nurse Julie on June 19, 2016, 09:57:23 PM
Been busy cleaning up and  satinizing the fork lowers (like original Honda ones were surface finished) on all of my projects including this 500K0 (apart from the 400/4 & the CB175) So that's 12 fork lowers to do   :'( :'( :'( :'(. I have set myself a task of a leg a day and so far so good. Luckily I had a NOS set of CB250K0 forks to replicate the finish from. Unfortunately, although NOS, they had a couple of chunks out of them so still needed the full works. Bought some Eastwood Diamond Clear coat to re-lacquer but not tried it out yet.

Still waiting for Yamiya bits from Japan to rebuild the engine ( primary chain & dampers, primary ball bearings  & needle roller bearing )
I thought that said sanitising the first time I read it Ash, I thought, Gosh, he's really giving them forks an intense super clean ;D ;D ;D
Your commitment to these old bikes is to be admired and I'm sure they will be fantastic when they are finished. Just out of interest, have you any bikes on the road at the moment and when was the last time you rode a bike?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on June 20, 2016, 07:39:58 AM
Been busy cleaning up and  satinizing the fork lowers (like original Honda ones were surface finished) on all of my projects including this 500K0 (apart from the 400/4 & the CB175) So that's 12 fork lowers to do   :'( :'( :'( :'(. I have set myself a task of a leg a day and so far so good. Luckily I had a NOS set of CB250K0 forks to replicate the finish from. Unfortunately, although NOS, they had a couple of chunks out of them so still needed the full works. Bought some Eastwood Diamond Clear coat to re-lacquer but not tried it out yet.

Still waiting for Yamiya bits from Japan to rebuild the engine ( primary chain & dampers, primary ball bearings  & needle roller bearing )
I thought that said sanitising the first time I read it Ash, I thought, Gosh, he's really giving them forks an intense super clean ;D ;D ;D
Your commitment to these old bikes is to be admired and I'm sure they will be fantastic when they are finished. Just out of interest, have you any bikes on the road at the moment and when was the last time you rode a bike?

One old CB250K3 on the road .. last bike I rode was two weeks  back and it  was a CX500 'plastic maggot' dare I say on here, pre getting cafe'd (not by me) .

 I deliberated long and hard about getting the fork finish correct  'cos I don't like the highly polished alloy look, I think it always lets so called 'show' bikes down. Done 8 fork bottoms now BTW in 'satinized' finish...so 4 to go ! I am just trying to get together a mini museum of the 60/70's Honda's I admired the most from tiddler up to CB750. I blame UK Pete and JamesH for giving me the 'bug'...call me a hoarder ...I am not even in their league! Back in the day when I went to work every day for 17 years on a bike I was not so fussy..even remember riding my CB350K around without a battery , just 20,000 microfard capacitor in its place  and getting a bollocking for using the then GF's hairdressing scissors for winkling out the circlip on my 1st 400/4 master cylinder.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on June 23, 2016, 09:23:31 PM
Stripped the 500K0 forks yesterday ....  a first time on CB500/550 forks for me. Man are 500/4 forks designed to strip so much easier than the other Honda's I have. Alloy sliders are in nice condition with no 'dings' so will refurbish nicely. Will post pics of all 12 fork sliders I have 'satinized/polished' soon, as the 500 ones are the last to do (will do my 400/4 ones in due course, going to leave the CB175K5 with it's original 'patina' for now).
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on August 21, 2016, 01:41:15 PM
Got all of my fork sliders cleaned up. Just need a final ultrasonic clean/degrease and clear coat. Bought some Eastwood Diamond Clear coat but not tried it yet.

Got my parts from Japan inc, primary chain and dampers plus some parts off that diamond geezer Bryan inc a nice gasket set.
Loads of BZP parts ready at Allenchrome inc spokes etc.

Got a nice set of USA bars C/W the K0 grips from DK, rather than rechroming my originals. I had chopped off one of my original  bar grips, as I thought it was a crabby aftermarket one but it wasn't  :-[ :-[

Started cleaning the head up today. Before I started, I filled the head skulls with acetone and no leakage so hoping to get away with lapping in the valves and general cleanup, provided the guides are OK.

[attachimg=1]


Found my 'lost' oil restrictor jet ...it was still  in the barrels.

Decided against using the 1 piece oil ring piston ring sets  I bought (although I can't really see much wrong with using them, as Paul on here did and has not had any problems) and bought --323--- Genuine Honda 3-piece rings at great expense only to find I also already had loads of sets of CB125 single ones, which are essential the same part, just a slightly different oil control separator. Also found CB125 pistons are exactly the same as 500/4 ones.

My original camshaft had a couple of tiny pits on two lobes so I decided I would get a replacement, as the rest of head looked nice and I want to do the best job I can. I got a nice cam from DK which , for reasons I won't go into, I ended up getting for free. I measured the run-out in my head and it is 0.05 mm which is half of the allowed service limit but when I put it in my head, oiled up and rotate it there is a tight spot, nothing serious but slight resistance to turning  never had that before. Any ideas anyone?

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on August 22, 2016, 02:41:06 PM


My original camshaft had a couple of tiny pits on two lobes so I decided I would get a replacement, as the rest of head looked nice and I want to do the best job I can. I got a nice cam from DK which , for reasons I won't go into, I ended up getting for free. I measured the run-out in my head and it is 0.05 mm which is half of the allowed service limit but when I put it in my head, oiled up and rotate it there is a tight spot, nothing serious but slight resistance to turning  never had that before. Any ideas anyone?

Sussed the problem ... when I put the camshaft in 'V' blocks at work. Someone at DK must have very slightly bruised one of the corners of the notch at the end of the cam journal (tacho drive side). i'll have it dressed and should be OK then.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: royhall on August 22, 2016, 02:58:56 PM
Six sets of forks on the go at once Ash. You must be a glutten for punishment. ;D
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on August 22, 2016, 03:07:07 PM
Six sets of forks on the go at once Ash. You must be a glutten for punishment. ;D

Did a set a day a month or so back, typically 2 hours/leg even using the lathe. TBH the 500K0 ones were a doddle C/W one of the CB250K0 sets and the 750K0 set which had deep marks in them. They will look nice when cleared coated though. Onto the hubs now. Had to make a rig to rotate the drums as my lathe is too small. Could do them at work but it would mean even longer away from home from the missus  ;D ;D (which wouldn't go down too well). Did I tell you a plastic air filter box off a 500 fell from the tall freezer in my garage onto her head when she opened the door .. this was 'reported to UK Pete when he visited me Friday  :-[ :-[ :-[.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on August 22, 2016, 08:25:21 PM
Yes ash that big nasty heft lump of an air box could of killed her and anyone in the near vicinity, she had a lucky escape
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Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on September 07, 2016, 04:56:22 PM
On my barrels (no fin damage) One bore  is worn, the other three are OK. There is a slight ridge at the top of the bore (definitely not hard carbon deposit) but its not only at the front (thrust) side but 90° to that too. It's been suggested that I examine the con-rod, wrist (gudgeon) pin  and piston to see if there is evidence of a slightly bent con-rod but I can't detect anything untoward on any of these components. One possibility is that the bore with damage had a broken ring and may have run with it in that state for some time if it did. Any ideas? I am going to measure the ring grooves in the offending piston tonight.

Already got +0.25 piston kits but unsure if it may need more than that now .. the reboring company is investigating.

Anyone got a spare 500 liner that's standard bore either decent or re-borable to +0.25 I can buy, if I end up needing one?

BTW if anyone ever wants a similar 750 liner I have quite a few.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on September 07, 2016, 09:56:19 PM
Ash do you have liners for k0 barrels?
pete
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on September 07, 2016, 11:07:24 PM
Ash do you have liners for k0 barrels?
pete

yes the ones that were originally  in my K0
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on September 08, 2016, 08:56:20 AM
Someone posted this in not so good English on the USA site:-

have you got a hydro Lock..or overfloted cylender at any time.?
..a Loose jet can drovn one cylender ,and vash all lube aut..so it vear faster then the rest
...lean running can do somthing like..and give a blocked piston..vho overloadet the rod(sleigtly bend)..but not broke it/...


My re-traslation of this bit :  A Loose jet can drovn???  one cylinder ,and Wash all lube out ..so it wears faster then the rest.  drovn??  = possibly drain/drown

There may be something in that as the dome on the head and the top of the piston had whitish deposits on them. The other three were normal appearance for a 21k miler.

Looked at piston ring grooves last night and not excessively worn

 Unfortunately, I never got the original carbs with the bike to examine the jets. James ?  any comments?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on September 08, 2016, 01:55:46 PM
Ash - have a feeling the carbs were completely gummed up / full of shyte, which is why I supplied a better set to you. Sadly no way to correlate the two. Did you get my message re the 0.75 NOS pistons and rings I have ? Give me a call as I'm at home with Will who's poorly today.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on September 08, 2016, 04:46:41 PM
I think he meant "drown" and i had a ford 3.0 v6 that seized a piston due to a carb diaphragm going and petrol washing all the oil from the relevant bore, checking a rod for twist and bend is easy if you have the correct kit, I have a couple of spare rods, not sure on codes, if you want one ash
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: UK Pete on September 08, 2016, 04:59:12 PM
Ash do you have liners for k0 barrels?
pete

yes the ones that were originally  in my K0

what are they like ash, oh and did you get my payment
pete
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on September 08, 2016, 08:34:27 PM
Sorry Pete ..yes got the payment ta !

I think they are slightly ridged at the top as they had done 46k miles ! I can bung a ring in them and measure the change in gap, top to bottom if you wish . I got some minters with pistons for 50 quid from actually going to DK, going through their stock and haggling for cash.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 31, 2020, 10:17:49 AM
Well it's been a long time in hibernation due to work commitments but mainly  many other projects coming my way like a CB72, Bomber, CD175A sloper, S90 and a 61 CB92 but this lockdown made me think it's time to finally put the early CB500K0 engine together.

Problem is, I planned to blank off all of the apertures in the crankcases after reassembling them bare and then bead blasting the outsides at work.....but that's not going to happen, as we are closed down where I work 3-days/week and I have no access to the bead blaster or a paint baking oven.

So it's back to the way I used to do it yonks ago with paint stripper, wire wheels, pressure washer, Dremel etc but at least I have big enough ultrasonic cleaner that I can get each case half into it to give the cases a deep clean and hopefully get rid of any residual oil in the pores. I got that ultrasonic cleaner from the skip at work and managed to fix it and it's proved invaluable.  Will keep you posted  but been working on it for a day and a half now cleaning the cases on and off. There is still light brownish staining inside the cases but I may have to live with that unless anyone has a chemical method of stripping it. I do have a 4l tub of nasty hydroflouric acid based alloy cleaner but I will only use that as a last resort.

The bottom end of this engine was in really nice condition apart from the cage inside the countershaft bearing breaking up and the oil guide B damaged, a rubber component, being torn. Julie& Trigger have kindly found me an oil guide and I bought the correct NOS --323--- needle roller bearing from DS and I got the other gearbox needle roller bearing (a --286-- CB250/350K part) NOS from Dave Ayesthorpes stuff.

I have been through my spares and managed to put together a full oil seal kit (thanks Bryan .. I got most of those from you) and I must have bought both of the primary shaft bearings ages ago plus the needle roller assembly in the primary drive ages ago from Yamiya via my mate Chris in Japan. Also fitting a new primary & cam chain plus the 8 damper rubbers and cam chain guides for good measure. The countershaft looked OK initially but the failing needle roller bearing had in fact marked the shaft.. I have two spares to look at , one I got from an autojumble for £1 (plus a kickstart shaft complete for £1) and the other Bryan kindly gave me ages ago when I went down to see him.

One  thing I need to fit is the 'Plate Oil Guide' as it was missing from my early engine, as predicted by Trigger (see diagram).

[attachimg=1]

My paintwork in the correct Candy Jet Green /black was done by Menno ages ago (superb job) and is safely tucked away in my loft. All of the fasteners have been BZP plated .. Frame was painted last year and fork bottoms polished plus original wheel rims replated and hubs satin polished but not lacquered yet. A place in Coventry, who are normally mega expensive, took on my rear mudguard and rear lamp bracket and made a really nice job at a brilliant price as a 'Stafford Show' deal. But when JamesH contacted  them about rechroming some  rims, sadly their quote  was very expensive. They also did my mega rare K0 chrome fork ears but I had stripped and prepped them myself with repairs to holes/dents done in high silver content silver solder. Dave Ayesthorpes stuff provided me with  NOS reflectors/rubbers  and fork genuine fork gaiters. OddJob kindly sold me a pair of new side panel badges.

My barrels were rebored to +0.25 by Trigger and I got CB125S pistons and 323 rings NOS for them ages ago.

 
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on March 31, 2020, 12:41:07 PM
Ash, i have to take the son to hospital tomorow for his infusion(crohns) and as my lockup is just round the corner i will have a look for that plate, i know i had 90% of an early clutch upgrade kit but its a while ago since i looked for it.
Anything else while im there mate?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 31, 2020, 01:26:40 PM
Ash, i have to take the son to hospital tomorow for his infusion(crohns) and as my lockup is just round the corner i will have a look for that plate, i know i had 90% of an early clutch upgrade kit but its a while ago since i looked for it.
Anything else while im there mate?

Please don't risk your lads health Bryan .. I think Woodside may have a plate anyway.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Nurse Julie on March 31, 2020, 01:41:42 PM
Why didn't you ask me for one Ash, I could have put it in with the other bits. 🤔🤔
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 31, 2020, 01:45:09 PM
Why didn't you ask me for one Ash, I could have put it in with the other bits. 🤔🤔

Sorry Julie ..I didn't realize I still need one till earlier today... I found my bearing retainer half ring so I will let you have other one back.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on March 31, 2020, 03:25:53 PM
No risk mate, i drop him off at door, garage is isolated and i collect him when he rings
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 31, 2020, 05:43:04 PM
No risk mate, i drop him off at door, garage is isolated and i collect him when he rings

I think I am OK for bits at the minute Bryan but as always appreciate your kind help.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on March 31, 2020, 05:54:28 PM
I deliberated over how to remove the yellowy brown film on the inside of the crankcases. Neither my ultrasonic cleaner on maximum sonics and full heating  would touch it. I was reluctant to dig out my 4l  tub of Hydroflouric acid, as this stuff is off the scale in terms of nastiness but a known cleaner used on aluminium (it used to be widely used by car aluminium wheel valeters until they saw sense). However, I found a bottle of weak sulphuric/ Nitric acid mix that a mate mixed me up ages ago, intended for 'desmutting' aluminium prior to anodizing so I decided to try that. Again, pretty nasty stuff but deffo lower league than hydroflouric acid in terms of nastiness.   I tried brushing that on the inside of the cases (obviously keeping it off any bearing surfaces etc.) and that semed to work fairly well. I then pressure washed it off with water and then hot tanked it in my US cleaner bath to removed all traces of the acid.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on April 02, 2020, 06:31:51 PM
Just appreciating what a lovely engine the CB500 is to work on, particularly compared with the CB750.

Still cleaning up the crankcases ready for paint... bit of a tedious task, so doing half an hour here and there until they are prepared enough. I still need to improvise a curing oven for the paint. I kept our old kitchen oven that would have been perfect but that's at work and I am not allowed access to work, so going to try to impovise an oven at home. Using our kitchen oven is a big no-no, as my wife Cathy suffers from quite bad asthma.

Ultrasonically cleaned the cylinder head but still need to clean out the ports as the U/S cleaner softened the carbon  deposits but it's going to need my Dremel and little brushes to clean out properly.  Valves are looking fine after a clean and grinding in, with just under 1mm seat width still, plus valve stem/guide clearance is OK and valve springs well within limits .. a bit of a relief as I was thinking I might have had to send the head to Trigger & Julie for seat recutting etc.

Managed to find a decent counter shaft among my spares....Bryan ... I used one I got for £1 from Newark autojumble, so I can let you have the one back you kindly donated to me when I came down to see you. I fitted all NOS needle roller bearings including the one in the starter ring plus new bearing to the primary shaft (plus I have the other  6205 bearing (new) to fit in the cases). I bought a rare NOS gearbox output bearing (283 part) as a panic, mega money buy, when I first got the bike but the one already fitted to the gearbox shaft was absolutely fine so I didn't fit the NOS one  (may need it for my Bomber engine possibly). All of the gears look fine with no chipping or drive dog wear. Fitted the 8 new primary drive rubbers. So the gearbox is all good to go back now.

Received the 'oil guide B' in the post from Julie ... massive thanks for that.

Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on April 02, 2020, 07:24:44 PM
Centre selector in good order mate? And are you fitting the later selector /clutch parts? If so dont polish the original clutch case the required one with mods is slightly different and  that plate you wanted is part of the mod kit.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on April 02, 2020, 07:53:20 PM
Centre selector in good order mate? And are you fitting the later selector /clutch parts? If so dont polish the original clutch case the required one with mods is slightly different and  that plate you wanted is part of the mod kit.

Thanks Bryan .. I think I may just add the mod plate to better lubricate the bearing and stick with the original cover etc as the bike won't be doing many miles and I guess the ones James owns and SteveD's will have the original shift mechanism. Or is that a big no.no?

The centre selecter measured fine and no signs of discolouring ... is there anything else I should be looking for? I do have spares as it's a CB350/250K part but it looked OK to me.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on April 02, 2020, 10:04:51 PM
It might be that plate that makes it need a different cover, not  sure. The mod was for better gear detent and to locate selector drum better plus better clutch operation so up to you
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Laverda Dave on April 03, 2020, 11:33:52 AM
What a great thread Ash! I have read the whole thing from start to finish during the past 90 minutes.  You have stopped me from going into my own garage to work on the Triton! Keep the progress reports coming and did you ever complete the CB175 mention in one of your original posts, I have a soft spot for those and the CB160 & CB200 :).  I wish I had room in the garage for the CB500KO James has for sale.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: JamesH on April 03, 2020, 01:15:48 PM
What a great thread Ash! I have read the whole thing from start to finish during the past 90 minutes.  You have stopped me from going into my own garage to work on the Triton! Keep the progress reports coming and did you ever complete the CB175 mention in one of your original posts, I have a soft spot for those and the CB160 & CB200 :).  I wish I had room in the garage for the CB500KO James has for sale.
Let's do trade for your restored 400/4 Dave :-)
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on April 03, 2020, 01:40:05 PM

What a great thread Ash! I have read the whole thing from start to finish during the past 90 minutes.  You have stopped me from going into my own garage to work on the Triton! Keep the progress reports coming and did you ever complete the CB175 mention in one of your original posts, I have a soft spot for those and the CB160 & CB200 :).

Cheers Dave .. I suppose these long winded resto threads are not everones cup of tea but useful if you get a similar bike as a project and need advice.

After I bought the 500K0 & the CB175 from a forum member my list of projects kind of grew as bikes just came along by chance, quite cheaply,  that I normlly always sat on the fence to buy, as they were  all usuall  quite expensive and parts were rare. But  after I got  this 500 I 'acquired' a '64 CB72 and '67 CB450K0 (all found in boxes in a garden in Crawley). Then I got a CD175 sloper press bike, a '66 S90 and a '61 CB92  .. all projects again from the same source but with the mega hard to find bits included in the sale. The CB175K5 still needs it's engine putting together (kickstart mechanism was knacked) but it's not a bike I am going to fully restore as it is low milage and the chrome is lovely, so best left alone ith with almost 50 year patina really.  The exhausts on the CB175 were 'OK' but I found a much nicer set in Japan that I obtailed via my mate Chris who lives there. I did own a CB160 when I was a student but it always seemed a bit dated even then and I much preferred the CB175,  so never had desires to own one again but the engine was ground breaking when released. Same with the C200 90cc.. I had one when I was at school and all of the girls laughed at it ... which left a permanent scar and no real desire to ever own one again.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: mattsz on April 03, 2020, 07:37:56 PM
Like Dave, just reading through this from the beginning - I've got some time!

The exchange below is from this thread - almost three years ago.  Nurse Julie foreshadows things to come...

Been busy cleaning up and  satinizing the fork lowers...

I thought that said sanitising the first time I read it Ash, I thought, Gosh, he's really giving them forks an intense super clean ;D ;D ;D ...
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on April 05, 2020, 11:56:50 AM
Discovered differences in early 500K0 clutch cover compared with the  upgraded one supplied as per Service Bulletin #4.

CB500/4 Service Bulletins

https://www.dropbox.com/sh/z8s0vpxu8niqva3/AAC1D8GaKGw_tvX0y2-CTcHaa?dl=0

[attachimg=1]
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on April 05, 2020, 02:26:25 PM
Is that where that little oil feed press steel bit fits Ash?
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: AshimotoK0 on April 05, 2020, 02:50:11 PM
Is that where that little oil feed press steel bit fits Ash?

Possibly Bryan.. I think I might need to take you up on those upgrade parts if you have any of them,  once all of this nightmare is over mate. Jason found me the little plate but talking to Trigger, every early K0 he's come across for an engine rebuild had those upgrade parts fitted and he he fitted them to the UK one he restored.

I hope I didn't come over as ungrateful when you first offered them .. it's just that I feared for your families health going on an trip to your lock-up on my behalf. I can assemble most of my engine without the clutch for the time being anyway. I will just make sure the screw in my shift drum is free, as part of the upgrade is to replace the shifter plate and pins.. Oodles of other projects to get on with anyway.
Title: Re: 1971 CB500K0 Resto 3/71 VIN 1000896
Post by: Bryanj on April 05, 2020, 03:10:55 PM
Ash, give me a bit of time to sort it all, you can build all the rest of the engine except clutch etc as the mod was done in situ.
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