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Pit bike back fire

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

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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.

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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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