Pit bike back fire

Wen I rev my bike it ok but soon as let go of the throttle it will backfire and pop, can this be stopped

Usually it means that there is a hole in the exhaust somewhere. (usually where the header meets the head) It may also be valve measurement too.

Depending on bike. Try replacing the exhaust gasket and make sure you tighten the pipe good ( don't break studs... Lol) or it's a sign that your bike is lean. Possible a clogged pilot jet.

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