The motor on the motorcycle engine is called the starter motor, and its function is to start the engine (commonly known as ignition).

The motorcycle starter motor body is installed on the engine and is grounded, and the terminal is connected to the starting relay. The other end of the starting relay is connected to the positive pole of the battery, and the starting button is connected to the power supply or ground. When the motorcycle is in neutral or the clutch is pinched (the clutch switch is turned on) ), press the start button to connect the circuit of the relay, so that an electromagnet is formed in the relay, which attracts the relay contacts to energize the starter motor.