i have a pc slip on and k/n fliter and outerwaer and a dyno jet im not sure if they jetted my quad will that do nethin because it seems like it has less top end? what willl happen if u have them mods and don't rejet

 

Well two big things could cause you to lose top end. One being that your pipe is made for bottom end and will decrease your top. Unfortenatly most pipes do this. Second being that your to lean on your main. Find out if the jet you have for a spare is bigger than the one in your carb right now. If it is put it in and try it. It could fix the problem or could cause more. if it fixes it and you have more top end (which you probly will) then leave it alone. if it makes it worse and starts to sputter and caugh then change it back... good luck