Honda-SOHC
SOHC.co.uk Forums => CB500/550 => Topic started by: AshimotoK0 on October 23, 2015, 07:54:16 PM
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Trying to gen myself up on the '71 model CB500F K0.
Downloaded the K0 Genuine parts list and bunged on my dropbox link and i had already loaded the Shop manual.
Obviously no Yamiya help on this one other than common ---300--- parts and noticed some gearbox cogs etc are good old CB250/350 ---286--- part numbers. Understand there was a bit of a weakness with the early gearboxes .. can a 500 guru expand on this for me?
If anyone on here has any decent cycle parts stashed, particularly mudguards fenders (US ) then let me know. Even ones that can be rechromed are acceptable as I have finally become comfortable with a couple or re-chroming companies and really pleased with the results I have been getting.
I am working on the assumption that by the time this old slowcoach kid gets round to needing exhausts then either DS or CMSNL or others may have cracked decent repro HM323 pipes at around a grand a set, which I would be comfortable with. Or is that a 'pipedream' :-[ I will email DS for an update and report back.
Found a couple of seat covers,one being in Japan. Any advice or an alternative decent source?
http://page7.auctions.yahoo.co.jp/jp/auction/g162257473
http://www.ebay.com/itm/HONDA-CB500-K0-K1-K2-1971-1973-SEAT-COVER-WITH-dyed-SILVER-LOGO-NEW-/181908509184?hash=item2a5a979200:g:wVoAAOSwQJ5URm2X&vxp=mtr
http://www.ebay.co.uk/itm/HONDA-CB500-FOUR-K0-CB-500-4-K0-MOTORCYCLE-SEAT-COVER-new-superb-quality-/281660695185?hash=item4194492291:g:g84AAOSwpDdVKpGchttp://
www.ebay.co.uk/itm/HONDA-CB500-FOUR-K0-KI-K2-1971-TO-1973-MODEL-REPLACEMENT-SEAT-COVER-/191596892187?hash=item2c9c10901b:m:m2eMOw-9iirVKeN0zyAAhsw
Going to email 'Shimpei' at Yamiya and ask if he is ever going to start selling 500/550F parts but I think I already know what the answer is going to be to that one.
What's the Achilles heel of the 500F? I have heard stories on here about cracked rear hub liners, tacho take off and unsure on the camchain tensioning arrangement. Which parts are common on the 550?
Hoping the Christmas break is going to see some good progress on my other bikes..made quite a bit of headway recently .. Ralph would be proud of me .. bless him!!
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What's the Achilles heel of the 500F? I have heard stories on here about cracked rear hub liners, tacho take off and unsure on the camchain tensioning arrangement. Which parts are common on the 550?
1. Cracked rear hub
2. Clutch actuating mechanism and pushrod (fixed on the 550)
3. Carbs that piss fuel (oh... they all do that :) )
Steve
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An awful lot of parts fit from 550 to 500s, even ( some ) gearbox parts. Will fit is not the same as will convince the experts and I would be none the wiser. Rear hubs, not even that big a deal, costs less to sort than chrome. Pretty tough bikes overall. K0 has a few differnt parts but I have yet to tackle mine. Seat and forks are different.
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I stole this from the Dutch Honda cb four forum.
I'm sure they don't mind...
(http://i1066.photobucket.com/albums/u404/Menno_Dek/Bildschirmfoto%202015-10-24%20um%2000.09.48_zpsucakdegg.png) (http://s1066.photobucket.com/user/Menno_Dek/media/Bildschirmfoto%202015-10-24%20um%2000.09.48_zpsucakdegg.png.html)
(http://i1066.photobucket.com/albums/u404/Menno_Dek/Bildschirmfoto%202015-10-24%20um%2000.10.24_zpsyqs232rk.png) (http://s1066.photobucket.com/user/Menno_Dek/media/Bildschirmfoto%202015-10-24%20um%2000.10.24_zpsyqs232rk.png.html)
(http://i1066.photobucket.com/albums/u404/Menno_Dek/Bildschirmfoto%202015-10-24%20um%2000.10.45_zpsciuojddg.png) (http://s1066.photobucket.com/user/Menno_Dek/media/Bildschirmfoto%202015-10-24%20um%2000.10.45_zpsciuojddg.png.html)
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Ash, all you got to do is ring when I'm at work mate,
Faults i know of
Centre selector--NLA but same as another bike
Clutch slips but never seems to wear out
Pushrod breaks if chain loose
rear drum
Early K0 have different switches, looms and block connectors
Oil pump cover "O" rings can leak
Swing arm bushes wear as fast as 750
Early cam cover rocker spindle covers can wear excessively
Primary chains can carve the oil galleries
Every thing else is one will break somewhere sometime type of fault.
At some time i will get all the SB and SL letters done and you can read them
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I stole this from the Dutch Honda cb four forum.
I'm sure they don't mind...
How could they ever? Here is where they got it from:
(scroll down a bit)
http://www.honda4fun.com/home/faq/generali/111-cb500-differenze-k0-k1-k2
The Dutch Honda CB Four forum is the only one that I know that is reserved for their members only. So they pick worldwide whatever they can get. In return the world gets nothing. Isn't the expression Dutch treat?
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What do you need to know Ash ? ;)
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What do you need to know Ash ? ;)
Really just soaking up the knowledge so that I don't have to make all of the mistakes I did with my 750K0 ... like instantly buying 'superceded' parts that I then had to sell and replace to get original look ( e.g. chain adjusters, DID scripted rims, front mudguard etc). Also if anybody has any decent 'rainy day' parts stashed away then you all know that I am not a cheapskate and I will pay decent money for the right bits. Also what I like to with bikes is get my head around the parts book and look for items from earlier bikes that are common or slightly modified that are almost identical. e.g I just bought an immaculate 2LS brake plate with all the chrome linkages from a US style CB360T that had drum brakes (not sold here in the UK) and the plate had a non-CB250/350 PN.. It cost me next to nothing and even the clear coat is perfect. The only difference to my 250/350 K1/K0's is the addition of a wear indicator add on, taht I just took off and it looks perfect.
Cheers for all the advice BTW.
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The only parts I found hard to lay my hand on was the exhausts, tank trim, seat cover and trim (bob does the seat trim now) All the over parts I got from the states, were there seems to be lots available. I even got a whole top end of a 6,000 mile KO for under a ton. The SOHC.net boys were very helpful.
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I still have quite a few NOS parts for the 500, if your looking for a part drop me a PM and I can have a look.
I've sold all my major NOS stuff now, seats, tanks, side panels etc. No front guards as I never liked them anyway and would always adapt a CB900 one to fit, I have quite a lot of NOS gearbox stuff, know where there are a few NOS centre selectors and some very hard to source parts.
Nice one ... not even got the bike here yet but sounds good when I strip the engine... Would they be good old QPM old stock Oddjob?
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Nobody has mentioned these little B******ds yet :( Are they short lived?
https://www.davidsilverspares.co.uk/CB500K0-FOUR-1971-USA/part_218524/
https://www.davidsilverspares.co.uk/CB500K0-FOUR-1971-USA/part_218911/
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I have had one cb500 usa inport engine that destryed 2 of the tensioners at 500 miles a piece before I pulled it out of the bike in favour of a 550. Never have got around to pulling down the bottom end to see why. Very stange as it all looked to be correctly installed and it ran ok for most of that milage, plusby then I had been running 500's and 550s for an awful lot of miles and nothing seemed untoward up til when it failed. Tacho caps, they go if you overtighten them, knock them when manhandling the engine when out of the bike or indeed the use of an impact driver to remove the screw retaining it - the only phillipz screw on the engine I can think of where I would not choose an impact driver as the first resort to disassembly. They seem to be hard to get hold of now, but having broke a couple over the years I think I overcompensated as I found a few knocking around - obviously ebay buys back when they seemed fairly common.
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Nobody has mentioned these little B******ds yet :( Are they short lived?
https://www.davidsilverspares.co.uk/CB500K0-FOUR-1971-USA/part_218524/
https://www.davidsilverspares.co.uk/CB500K0-FOUR-1971-USA/part_218911/
Can not understand why you think they are short lived parts. Never had a problem from the tensioner and have picked them up cheap on German ebay. I think the tensioner and tacho caps have problems from heavy handed owners.
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Nobody has mentioned these little B******ds yet :( Are they short lived?
https://www.davidsilverspares.co.uk/CB500K0-FOUR-1971-USA/part_218524/
https://www.davidsilverspares.co.uk/CB500K0-FOUR-1971-USA/part_218911/
Can not understand why you think they are short lived parts. Never had a problem from the tensioner and have picked them up cheap on German ebay. I think the tensioner and tacho caps have problems from heavy handed owners.
Think Matt explained it above .. as i say i am a newbie on the 500F ;)
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The funny thing is the original engine for my 500 ran for at least 180 000 with no attention at all other than oil changes and checking of clearences and tensioning of camchain, not bad at all considering I bought it with a weeping head gaskett, kick start leaver that slipped on it's splines and a starter that sometimes just slipped - and oil that was like tar and 60k on the clock. Like I say tough little cookies setup and treated right. On mine the starter cluch slipping was resolved by a couple of oil changes - the progressive inprovement as it had its 1000mile oil changes convinced me not to pull the engine to bits, the kickstarter leaver was resolved by changing just that and not the shaft even though a new one came with the bike. After that it started jumping out of 1st gear then second. The Usa inport that ate tensioners was attempt 1 at an easy fix. After that I found 550 lumps cheaper and easier to source.
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Those two DS parts are not mentioned as its only heavy handed PO's that damage them mate
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Well I just treat myself to a new Genuine Honda front guard ... Anyone got a decent 3-hole USA style rear thats suitable for a re-chrome?
Is the 750 one the same apart from minor changes ..like length of wiring tunnel.
Dug out the front wheel that was on my 750K0 originally ... assume it's the same rim as the 500 (its a K1 wheel and I had to get a proper K0 750 one for my 750 Grrrr ! even the disc and hub width was different on the 750K0 to the K1->K6).
What size is the front disc on the CB500F .... is it smaller than the 750? As you can gather complete Newbie on this 'un :)
Cheers ... Ash
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Ash - hold fire on a rear fender as I think I've got that covered. Will explain on pm..
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Not sure if 750 rim is wider or not but hub and speedo drive is same, 500 disc is smaller but dont tell the breakers that the 500 twin is the same part
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Well I just treat myself to a new Genuine Honda front guard ... Anyone got a decent 3-hole USA style rear thats suitable for a re-chrome?
Is the 750 one the same apart from minor changes ..like length of wiring tunnel.
Dug out the front wheel that was on my 750K0 originally ... assume it's the same rim as the 500 (its a K1 wheel and I had to get a proper K0 750 one for my 750 Grrrr ! even the disc and hub width was different on the 750K0 to the K1->K6).
What size is the front disc on the CB500F .... is it smaller than the 750? As you can gather complete Newbie on this 'un :)
Cheers ... Ash
Can I ask were you found a 500K0 original front mudguard ? I could not find one for my UK, 500KO so, had to use the 750K and used the old stays (re-chromed).
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That's exactly what I am doing Graham ! If the chroming on the blade turn out to be sh*te it's going straight back though. Last time I bought an early 750K1/K2 Genuine Honda one I sent it back due to pinholes in the chroming and they had to go through 14 to find me a decent one. Never did use it on my 750 though as it should be double-cut, bought it for 75 and sold it on for 200 , ah those were the days when Honda prices were 'reasonable'.
Ash
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Hi Oddjob please let me know what you have as I will need all of the items you mention. I do have a rim I was prepping for a rechrome but I will hold fire for a bit. Sounds like your loft is a bit like mine ;D ;D.. Groaning under the weight of bike parts.. I have banned the rest of the family from going up there !
Cheers ... Ash
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Is it 'Time of the year' for Lofts.......I have also just installed a new Loft Ladder.......two man job said the Instructions........ha said I.......not a problem said I........4 days later after much effing and jeffing 'twas finished! Yes you CAN fit the springs with the ladder down - despite what the instructions say.....but guess what....had to take it all down again and fitted the springs from inside the loft space. talking to my Builder a few days later he told me how his Opo tried to fit the springs on his own.....spring snapped back at it's extremity and sliced right through his palm and fingers. Very, very nasty injury which kept him off work for a long time - GULP. One for the memory bank methinks!
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Need advice .. Got the 500K0 nearly totally stripped ( not engine) and good news that forks, cam/rockers and rear drum are all fine. However the two engine mount bolts (front, bottom) are really tight. I don't want to break the crankcase lugs. Any ideas? Not heated anything up yet, just soaked in WD40. Thought of Mig welding a blob onto the side of the nut to get some localized heat into it. Is this a common problem?
[attachimg=1]
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Common problem with any bolt that has not moved since 1971, get a blow touch on it until it starts to glow and it will fall out easy.
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I just hope you dont get one as stubborn as the last one Iihad stuck in that position, even heated to red hot I found it wouldn't budge, it did break the web that held the nut in position under the engine, then I had to gas axe it out. Deffinately use soaking in wd40 or plus gas or my favorite, old engine oil and wd40 mixed, and heat rather than force. Worth cutting the bolt head off I think.
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I have heard that diesel fuel makes a good penetrating fluid,and fairly cheep at £1.10 a litre
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Cheers for replies .. So plenty of heat then Graham........ we have a Mapp gas burner at work I will borrow that. I did think of cutting off the head of the bolts Matt but what do you do if the steel in corroded and seized into the alloy as you need to push the remains of the bolt through? suppose you could carefully drill it out. All the other bolts on the bike came out really easily... buy yea 44 years is a long time to corrode. I wan't to be really careful on this one so as not to damage the cases.
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I know what you mean about not wanting to dammage cases having done this myself, but luckily on a nondescript cb550k3 with a non original engine. I think if the heat route doesn't work then I would try to cut through the nut ( just one side would quite likely be enough, - use of a dremel to finish the cut once too close for comfort with Mr grinder ) on the underside of the engine as on mine it was the nut attempting to turn as I applied torque that split the webbing on the crankcase, in reality, purely cosmetic bar the inconvienience of having to apply a 17mm spanner rather than rely on captive nut but on a 500k0 I can see you don't want that.
If that failed then probably cutting the head off the bolt and parrellel pin punch the remains out, if that is not budgingit then a 1mm slitting disk in the grinder, turn the bike on its side and use a pry bar to just open the frame enough to get the disk between frame and engine casing before removing all other bolts, then drill out anything that won't punch out. I deal with a lot of bolts this age and that siezed up at work and some have litreally needed completely drilling out, even that last 1/2 mm down just one side of the hole. I hope yours is not that siezed up.
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Great advice Matt ...bet you must get some really rusted bits of machinery at your place.
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At home a lot of our kit is 1900's - latest projects through the door 3x howard gems ranging from 1948 to 1960's. At work stuff is not quite that old but some of it may have done 30 years bagging rock salt and being sat outdoors. I have worked on bulk baggers for aggregates that have worn through or rusted out 3 distinct layers of repairs done in 6mm steel plate. Lucky me is now the chap responsible for most of the welding repairs and patching and shot blasting of these 12 foot tall monstrosities if they come in used.
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Are your foot pegs like this Ash ? >>> http://www.ebay.co.uk/itm/1971-Honda-CB500-Four-KO-OEM-Front-Foot-Peg-Brackets-6-/141819872691?hash=item21051f85b3:g:PCQAAOSw3ydV6fnT
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Never seen one of these before, Frank says it is OEM >>>http://www.ebay.de/itm/CB500-K0-K2-CB550-Auspuff-rechts-IR-right-muffler-CB500-4-FOUR-Schalldampfer-/151875992212?hash=item235c83ba94:g:kv4AAOSwwbdWO0et
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Will check footpegs as I am bead-blasting them after work. ( wife away in London ;D)
Never seen separate silencer --- only one-piece but I am no expert.
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Here goes Graham
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