What Causes a Motorcycle to Backfire?

1 Answers
VanDaniela
07/30/25 9:14am
Motorcycle backfiring can be caused by the following reasons: Damaged Muffler and Exhaust Pipe: Symptoms include hearing abnormal noises from the exhaust pipe when accelerating, with no abnormal driving conditions, increased fuel consumption, and sometimes noises coming from the front section. Aged Heat Shield: Symptoms include abnormal noises under the engine during low-speed driving or when accelerating, especially in colder weather. The motorcycle needs to be lifted to check if there's a heat shield between the exhaust pipe and the ground, which may be causing the noise due to aging. Damaged Exhaust Pipe: Symptoms include abnormal noises when turning or moving forward, often originating from the front drive shaft joint that has already been damaged.
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