my 87 250x has a fmf header and silencer k&n fillter and is getting a 12.1 .060. piston installed do i really need a cam and or head work im not trying to get every bit of power out of it i just need a little more than i got oh ya!! what size jetting do you guys think i will need my buddy will give me his 400ex carb will that work or be to much
thanks

 

powroll said it would be a good mod on the 300 ex so it should work on the 250