Author Topic: 1971 CB500K0 Resto 3/71 VIN 1000896  (Read 34125 times)

Offline AshimotoK0

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1971 CB500K0 Resto 3/71 VIN 1000896
« 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)

 



« Last Edit: November 29, 2015, 08:18:50 PM by AshimotoK0 »
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Trigger

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Re: 1971 CB500K1 Resto 3/71 VIN 1000896
« Reply #1 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

Offline AshimotoK0

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Re: 1971 CB500K1 Resto 3/71 VIN 1000896
« Reply #2 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
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #3 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
Im a Nurse, trust me, this won't hurt.....much !!!

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline Woodside

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #4 on: November 30, 2015, 07:15:56 PM »
Does anyone know how many of these early engine 500's were made.?

Offline Woodside

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #5 on: November 30, 2015, 07:19:55 PM »
Well asking that question made me an expert?
So perhaps I should know
« Last Edit: November 30, 2015, 07:52:15 PM by Woodside »

Offline Jamesh_sussex

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #6 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?

Offline AshimotoK0

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #7 on: November 30, 2015, 09:02:33 PM »
Cleaned some parts in paraffin parts washer then fine bead blasted ready for stripping and replating.

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“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline AshimotoK0

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #8 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.
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Woodside

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #9 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...

Offline RGP750

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #10 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
1972 500/4
1973 CB175
1972 CB175
1959 BSA Super rocket
1927 960cc Matchless 'v' twin
1969 750 K0

Offline AshimotoK0

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #11 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
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline UK Pete

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #12 on: December 01, 2015, 02:33:00 PM »
great project ash , i look forward to seeing your progress
pete

Offline AshimotoK0

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #13 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.

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« Last Edit: December 01, 2015, 08:59:09 PM by AshimotoK0 »
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Jamesh_sussex

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #14 on: December 01, 2015, 08:16:52 PM »
Looks like you're giving that bead blaster a good workout ash!! Nice progress.