There are two main types of sensors in motorcycles:
1. Electromagnetic pulse sensor, its main role is: to provide accurate and timely ignition ignition advance Angle of the starting Angle position, and engine speed factor.
2. The degree sensor, usually electromagnetic pulse type, its role is to provide counting pulses to the speedometer and odometer. The above two are necessary for each motorcycle, and various other sensors, such as liquid level sensors, battery charging and discharging current sensors, fuel tank sensors, engine temperature sensors, etc., are optional.