View Full Version : popping from my atv
mustang25
05-26-2006, 02:32 PM
i have a 2006 trx250ex.....it has an fmf megamax exhaust and a k&n airfilter, for about a week now it has been making a popping noise from the exhaust everytime i let off of the gas......any1 know what this is?:confused:
rooster300ex
05-26-2006, 04:22 PM
prolly lean jetting.
Mx_523
05-26-2006, 04:34 PM
Did you change the jetting when you put on the air filter and pipe? If not, your to lean.
RiderTRX400ex
05-26-2006, 04:35 PM
lean pilot jet, you might be able to adjust it out with the fuel mixture screw.. and yes, you will need to rejet to get maximum gain from your mod.. you wont regret it in the long run
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