What Causes a Motorcycle to Fail to Start After Leaving the Lights On for Too Long?

1 Answers
GiaRose
07/30/25 12:54am
Motorcycle failing to start after leaving the lights on for too long can be attributed to the following reasons: Magneto malfunction: Weak magnetism in the magneto rotor's magnetic steel. When kick-starting, the engine's low rotation speed results in insufficient electricity generated by the magneto to produce a strong spark. The motorcycle can only start when the rotation speed reaches a certain level where the generator produces enough electricity. It is recommended to replace the magnetic steel. Battery depletion: Check if the battery has power. Batteries left unused for a long time without timely charging can easily get damaged and should be replaced promptly. Spark plug or carburetor malfunction: If the battery is functioning normally, the spark plug should be replaced. Additionally, water or debris may have accumulated inside the carburetor. Loosen the screw at the bottom of the carburetor to drain out the debris or water.
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