I am getting ready to rebuild the top end on a kazuma 90cc mini-falcon. What I am wondering is does anyone have a manual for these things or can you tell me the ring gap tolerance? As well as the valve adjustment #'s and the ring installation spacing? Anything to look out for? Thanks.

 

I use the specs from a Honda 50-70 manual I have..

Valves are set at .004 stone cold..

Ring gap.. .008 to .012.. over .018 - .020 would be worn out..

I place the gaps in the rings 120° apart at installation.

 

Thanks for the info. Already had to engine sitting on the bench last night when my parts finally arrived. Took about an hour for tear down and rebuild. Purrs like a kitten.