SOHC.co.uk Forums > CB500/550

Kick start and clutch operation

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CB-500:
After quite a few google searches by accident I came across a few posts on the sister forum where people have experienced the exact same problem with their 500 kick start - they also had the problem after a rebuild or if the engine had been sat on the bench partially stripped/built for a extended time

One post explained that they also were convinced everything was assembled correctly and decided to forget about the kickstart and just continue with the project - They found once their project was up and running they randomly decided to re-look at the kick start issue - However the kick start was working with no explanation

I looked at my engine again - concluded that everything was assembled correctly - So with the clutch fully fitted started lightly jolting the kick start - after quite a while I noticed the primary gear drive started jolting along with the clutch - at the same time as jolting the kick start I started manually turning the engine over - after quite a few turns everything appeared to free up and the kick start is now working as it should

davidcumbria:
That’s good news. Sounds like the whole system has to rotate a few times to self align. Hard not to worry about these things when you’re not rebuilding engines every week!

McCabe-Thiele (Ted):
That is weird.
I did wonder if lack of oil everywhere might be part of the issue hence why I kept on thinking friction in the bores was causing it.

CB-500:
If you go back to the kick start a while later it is again stuck - However it appears to free off easier each time

A mate of a mate who builds race/competition engines mentioned that the engine assembly lube I have used is fine for my normal engine build but can be known for causing slight drag on components during the build process - All should be good once up and running with normal engine oil circulating

Thanks everyone for your help on trying to resolve

McCabe-Thiele (Ted):
Out of interest before I fitted my pistons I could rock the crank by hand using the bottom gear on the primary drive - now with the pistons in place - no chance. I put that down to the friction from the new pistons.

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