Post by indymoped on Jun 10, 2013 3:42:42 GMT -5
The black looks normal. Not sure on it having a dished piston. I have seen dished pistons on car pistons but when i did my 50mm BBK it had a flat top piston. If the scoot still has the factory head then that partially explains the high compression. My 50mm kit had 193psi and that was with the BBK head which has a larger chamber.