when doin a cam?

[slamedsilverado]

when u do a cam in a motor......does the jetting have to be changed? or is the jettine one changed when filter or exhaust is done?

[sandspanker]

:) jetting has to be concidered when all of those mods are done;)

[cals400ex]

a cam won't change jetting much if any. when i did my cam and piston combo i needed to go up on the mainjet about one size. i would just make sure your jetted right now and then check after you mod your engine. its not that difficult to change jets if need be. good luck

[Tommy 17]

yes u have to rejet... its a big increase... with my piston/cam/stk pipe i'm at like 165 now

[kx515]

Yea you should have to rejet. When you change cams you are letting the valves stay open longer which lets more fuel in. (I think that's right)???

It's possible

[2004TRX450R]

Well when I put the cam/airbox mod/silencer end cap in on my bike I went from a 118 to a 185 main. So yes you will have to rejet. If it doesn't make enough difference to rejet you probably aren't going to see a whole lot of power increase either.