2002 yz426 motor. the whole air box took off. k&n air filter white bros R seiries full system. the cam mod about how much power should i have? and should i make the pipe into a shorty? i know how to do it because i did it befor but would i gain any power? when i did it to my 400ex i didnt realy feel a gain. --------- and for the clutch. is it the springs or the clutch plates that give a lightend fly wheel effect?