350x backfire

[ovhonda1]

Anybody with a 350x ever have popping (backfiring) after the engine has been revved high? When I let off of the throttle after hammering it the engine backfires several times. The bike runs strong, but I was curious if this is a common trait.

[Tri-ZNate]

Its common on alot of ATVs, especially if you go down hill and let off on the throttle.

[Unclediezel]

Believe it or not -Exhaust systems are not for noise control -power enhancement- Or just to look cool---Its a Flame arrestor for backfires (Spark Arrestor)

[Unclediezel]

If you ever watch drag racing on TV- The flames that come from the exhaust are completely normal

[Vealmonkey]

I know that if you have a leaky exhaust gasket or a lean fuel condition that it will cause the back to backfire when you rev the engine up and let off the throttle real quick. Often if you change to a different air filter or exhaust the engine will begin to backfire alot. It usually means you have to rejet your carb.

[86350xhauler]

My 350X only does it when it is revved extremely high in a high gear. Other than that it runs smooth.

[Oldshell4481]

its excess gas igniting in the exhaust i believe

[ovhonda1]

thanks for the replies everybody.

[TeamGeek6]

Yep, excess gas. It can be caused by too lean an idle mixture.

[xman23]

yepp, my 200x also does it when i got her pinned in 5th and let off, it gives off a pop or 2

[breastman569]

anyone ever tell you that you timing is off just a little check it and bet it will solve everything. my 200X was doing the same thing and sure enough that was it. check that first.

[Rm250RF900R]

Every 4 stroke I've ever owned (xl80s, xr100r, lt185) always backfired when using engine braking going down a hill.

[atctim]

My 350X did the same thing when I had the cobra muffler on it. After switching over to the 450R muffler it has stopped. Are you running stock exhaust / muffer, or aftermarket?

[BLAZERONE22]

Go up one size on your idle jet and it should quit. Your just lean a little.