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What are the symptoms and causes of a motorcycle misfiring cylinder?

1 Answers

HeidiMarie

07/29/25 11:01pm

The symptoms of a motorcycle misfiring cylinder are noticeable body shaking at idle speed. By observing the exhaust pipe outlet, the exhaust gas flow shows obvious intermittency, accompanied by severe shaking of the exhaust pipe. A distinct 'putt-putt' or 'thump-thump' sound can be clearly heard. The causes of a motorcycle misfiring cylinder include a faulty spark plug leading to the misfire, or a damaged fuel injector that either fails to spray fuel or provides poor fuel atomization, resulting in incomplete combustion and cylinder misfire. Repairing a misfiring cylinder depends on identifying the specific fault: Damaged components such as spark plugs, cylinder wires, or ignition coils can easily cause misfiring. The 'ignition cut-off method' can be used to determine which cylinder component is faulty, followed by replacing the damaged part. For clogged fuel injectors or short-circuited/open-circuited injector wiring, a 'fuel cut-off test' can be performed to locate the fault point and carry out the necessary repairs.

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