What Causes Abnormal Noises in a Motorcycle Engine?

[LaKingston]

Here are the specific reasons for abnormal noises in a motorcycle engine: Engine Mount Deterioration: Abnormal noise caused by engine mount deterioration due to rough engine operation. This noise occurs when the fuel injection timing is too early, and the fuel injection advance angle should be readjusted. Engine Misfire: The abnormal noise has a certain pattern and is accompanied by unstable engine speed and intermittent black smoke emissions. This uneven noise is caused by diesel leakage from the fuel injector, which requires maintenance of the injector. Piston Slap: The exhaust pipe produces continuous backfire sounds during exhaust, along with black smoke and overheating of the exhaust pipe. Starting becomes difficult, and the backfire sounds lessen at low speeds. This noise is due to excessively delayed fuel injection timing, and the exhaust pipe position should be adjusted promptly.