Originally Posted by
3Wheelermaniac3
Cylinder bore is 82mm. I have a wiseco .50 over 12:1 comp piston that came with the bike. It was a spare that was given when I purchased the bike due to the previous owner did not make the necessary modifications to accommodate the larger displacement and dropped a valve. I am rebuilding this questionable set up and am unsure of the mods I need to do to run on pump gas. As I stated I have been " rebuilding " these engines since I was 10. And also stated that I never did performance mods to them. I should have said that I've always went to an over ring or next up bore. I've never messed with anything that has a .50 over piston. So yes I am kind of clueless on how to set up something with this size piston. Also the question on pistons is does wiseco make a .50 over 10.25:1 piston. And the port job I did is very light pretty much just took out what did not match to the intake flange. With an even transition.