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Diagnostic procedure for insufficient battery charge


A motorcycle's charging system consists of a magneto, a rectifier-regulator, and a battery. A problem with any one of these components will result in a dead battery and failure of the electric starter.
The magneto needs to provide sufficient electrical energy. It consists of a magnet rotor and a coil stator. Its performance is affected by the strength of the magnet's magnetic field and the technical condition of the coil, such as whether there is a partial short circuit or a partial open circuit, which can be checked with a multimeter.

 


The function of the rectifier-regulator is to rectify and regulate the AC power output from the magneto into suitable DC power to charge the battery.


The function of the battery is to store electricity. Its failures include: 1. Reduced capacity; 2. Damage. Internal partial short circuits make it difficult for the charging voltage to rise to the specified value. After several uses of the electric starter, the battery is depleted, or after being left for a period of time, the electric starter cannot be used.