just curious if anyone has ever tried to change out the c50 piston, sleeve, and heads to a c90 for larger displacement. My bike is on 06 c50 but would like more jam. I’ve replaced the air filter with a cold air intake and did the exhaust. I have a lifter knocking and need to tear it down to fix that problem and thought maybe I could do the top end of a c90. Any advice would be greatly appreciated.