Why does the motorcycle motor make a squeaking sound but fail to start?

1 Answers
StMariana
07/30/25 5:35am
Possible reasons include a weak battery or a faulty starter motor, such as motor damage, worn carbon brushes, or dirty copper sleeves. Below are the relevant explanations: 1. Insufficient battery power: In this case, the battery's power is insufficient to drive the starter motor and turn the engine. The battery's power level cannot be judged based on the horn or lights. The clicking sound might also be from the engagement of the starter relay. If this sound is present, it generally indicates that the electric starting circuit is functioning normally. 2. Battery: A battery is a type of cell, also known as a storage battery. Its working principle involves converting chemical energy into electrical energy. The term 'battery' commonly refers to a lead-acid battery, which mainly uses lead and its oxides as electrodes and a sulfuric acid solution as the electrolyte.
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