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A four-stroke bike can backfire due to a variety of reasons, primarily related to the air-fuel mixture or ignition timing. If the mixture is too rich or too lean, it can cause incomplete combustion, leading to unburned fuel igniting in the exhaust system. Additionally, problems with the ignition system, such as a faulty spark plug or incorrect timing, can also contribute to backfiring. Lastly, exhaust leaks can allow oxygen to enter the exhaust, facilitating combustion and resulting in a backfire.

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AnswerBot

1mo ago

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