SOHC.co.uk Forums > CB750
smashed cases
cbnovascotia:
yeah, it does seem like a road to endless problems to mix n' match. A highly recommended welder offered to fix it and glass bead the cases for about $100 Cd. He probably bead the barrels and head for another $25. I'll leave it at that! Thanks for your input kaceyk2. I'll figure out how to put up some pics soon of what I'm working with, here across the pond.
AshimotoK0:
K0's and K1's had different cases for the output shaft bearings (not sure on K2) K0's and K1's had the same two bearing sizes but they are grooved on the K0 and ungrooved on K1. Suspect K2's used the K1 arrangement
Also quote from ChrisR
'All CB750's from about the K3 model on used the same output shaft bearings according to the parts lists, ie, the one with the twin row ball bearings against the oil seal.
The F2 did use a larger - 630 - output sprocket, and hence a different output shaft, but the bearings were the same as on the later K models'
Cheers!
ash
Spitfire:
I also would stick to the cases that came with the bike and get them repaired, you mentioned bead blasting the cases, I would be very carefull of that as you certainly do not want abrasive material getting into the oil ways.
Cheers
Den
SamCR750:
Poor maintenance and the small sprocket size was the main causes of early chain breakages.
Modern chains are much better than they were 40 years ago and After Honda fitted larger sprockets to slow the chain speed down, the problem all but disapered. Maintenance is the key though.
Sam. ;)
Spitfire:
It didn't help that we thrashed them to death, I remember going down to Brands Hatch (Ago and Phil Read on MV's if I remember right) for the day (from the Wirral) and on the way back looking at my chain when we stopped for petrol. It was all siezed up, I had to buy some oil, soak a rag with it and hold this to the chain while spinning the back wheel, luckily it worked and the chain freed off. Mind you there was 4 of us all on CB750's (mine was a K1 converted to 900) and we were cruising at 100 mph, which probably did not help much.
Cheers
Den
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