SOHC.co.uk Forums > CB750
750 K2 Strip & Rebuild - help please
Trigger:
--- Quote from: Lobo on July 21, 2022, 04:22:00 PM ---All rather confusing for the restorer as the fastener Part # does not specify the bolt’s finish. This arvo I googled the common part # for the starter cover bolt (CB750, K1, K2), and was ‘shown’ very ordinary (Honda packaged) BZP bolts. How does one know what is right?
Moving on, I looked more closely at the Sandcast Starter motor cover plate, and noted it too (just) fails the feeler gauge check… ie there is a discernible 0.5mm gap. I’m beginning to reckon the plates are non-OEM as everything else looks correct and original.
In the case of the K2 rebuild, and the new Yamiya plate, I’ve ‘fixed’ the problem by adding a thick SikaSeal adhesive base to the packing seal, ie raised it 1.5mm. For now, it’ll do until I get to the bottom of the issue….
One last query; one starter cover plate is mirror chrome, and the other a brushed chrome finish. Which is original pls?
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The cover plate is flat mirror chrome. I have had a look at all my starter motor cover on 750's and all sit flat, not sure if i got them from Yamiya though ::) If you are not having any joy contact yamiya as, they will take a new one out of the packet and test fit it to one of there bikes ;)
Trigger:
--- Quote from: Oddjob on July 21, 2022, 04:56:50 PM ---One nut that seemed to retain the chrome look was the upper shock absorber cap nuts and the big thick washers behind them.
Another was the pinch bolt for the rear brake arm on the rear brake plate. Same for the gear lever pinch bolt, some changed but some retained the chrome one.
Some fasteners do use an identifier on the end, modern Honda JIS screws for instance can be identified when they are black and also when they have a captive split washer, for use on handlebar switch gear for instance.
Oh just thought of another chrome bolt, rear number plate bracket ones, the 4 which attach it to the guard, they tended to be chrome with chrome washers, as did the rear light ones come to think of it.
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The rear number plate special bolts had chrome washers under them. Not all SOHC's and years came with chrome rear light bolts in chrome and the ones that did had chrome washers beneath them ;)
Lobo:
Rebuilt the forks today, and tomorrow, will fill with oil.
Any recommendations (oil grade) to go for, or just stick with book figures.
Ta…
K2-K6:
Motul 10 viscosity if available in your marketplace.
Lobo:
Thanks Nige… Agip oil went in as locally available.
At last the rebuild begins, with the engine into the frame today. Am lucky enough to have an electric hoist in my garage roof - worth its weight with the Moto Guzzi rhinoceros thing…
All went smoothly with no dents nor scratches anywhere; my missus is becoming better and better @ such helping chores.
Q - the various fork bolts. (1) how come there aren’t D washers at every clamping joint, and, (2) should you expect the D washers (Fork upper bridge) to be loose or clamped at the 6ft lbs torque book figure. Mine, currently are rattling, though tbh I’ve only done them up guesstimate tight for now.
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