Hi all, I have a 1997 banshee with a coolhead running 21 cc domes, its always giving me a hard time to start finally it wont start anymore.......so I went and tor down the top end.....The right side piston had alot of carbon build up on top of the piston and the left had a little.......but cylinders looked fine..my question is what size domes should I be running'????????? its a stock motor with pipes single carb conversion, vforce reeds and cool head.........should I go with a standered bore or go to a larger bore size now that I'm rebuilding??????any help would be greatly appreciated.. Oh and I run 91 pump gas........32:1