yea i have to do a lil more research on it. its a common thing in modern dirt bikes to ONLY upgrade the intake cam. however there is no fuel injection on a dirt bike either. im still lookin into it, but if yall have any more advise it would b greatly appreciated. i dont plan on upgrading the fuel system unless its just the pressure regulator. the stock system should do just fine. im only hoping for 190 hp MAX to the wheels. i mite need the prelude injectors n a pressure regulator for that, but thats it. any other comments/advice would b appreciated! thanks all!