This is weird.

[ATV_MAN]

Everyone always says to rejet after eveything you do to your quad like pipe and filter things.But i have installed an e series slip on and a k&n filter and have found no need to rejet it runs fine?I also sometimes run without a airbox lid and still find no reason to rejet it doesnt sputter or anything .Is something wrong?

hey did you have FDO do anything to your motor?

if you dont rejet it always not sputter. but you will prob. feel more power gains with the rejet

[trx400ex]

engines actually like to run lean, people rejet because it will hurt your motor from running leaner (hotter) if you dont

[MX MadMann]

it is running to lean right now and you will have engine ceasure if your not carefull. throw a bigger main jet and pilot in there. remove ur choke while ur at it :D

[ATV_MAN]

Originally posted by GNCCer
hey did you have FDO do anything to your motor?
Yes i did.They fixed my oil leek in it and they increased intake and exhaust porting and they ceeded my valves.I can feel the difference, it feels stronger now.