What charges the battery on a motorcycle?

The battery on a motorcycle is primarily charged by the motorcycle's charging system, which typically includes three main components:

1. Stator (Alternator)

• This is the heart of the charging system.

• It generates alternating current (AC) power when the engine is running.

• It's driven by the engine’s crankshaft.

2. Regulator/Rectifier

• Converts the AC power from the stator into direct current (DC) to charge the battery.

• Regulates voltage to prevent overcharging the battery (usually keeps it around 13.5–14.5V).

3. Battery

• Stores the DC electricity and provides power to start the bike and run electrical components when the engine is off or running at low RPMs.

How It Works (Simple Flow):

Engine runs → Stator generates AC power → Regulator/Rectifier converts and controls it → Battery charges.

Additional Notes:

• If your battery keeps dying, it could be due to a faulty stator, rectifier/regulator, or old battery.

• You can test the charging system by measuring battery voltage with a multimeter while the engine is running. It should be around 13.5–14.5 volts if charging properly.