from the xtreme website kit# 200993 hp piston, hp cam? and later installed the bigger carb? or put the carb on first and then this kit? any notable differances? what gives more bang for the buck. do you need to do head work when installing the cam. im sure a guy could do porting and the other stuff. dont really want to do the 146cc kit right now. not legal in a 90cc mod class if he does decide to go racing. thanks for youre thoughts and happy turkey day to everyone.