YBR125 motorcycle gear sensor wiring harness, sensor installation position, wiring harness interface and YBR125 gearbox/instrument fully match, directly replace the original parts without modification; With built-in copper contact, the sensor can accurately identify the gear information and transmit it to the instrument to ensure the accurate display of gear; The outer layer of the wire harness is made of corrugated wear-resistant casing, which is resistant to pulling and aging, and suitable for the complex working conditions of vibration and scraping in riding. The sensor is fixed to the corresponding hole position of the gearbox, and the wire harness plug is directly connected to the instrument interface, which is simple and efficient to operate. The interface between sensor contact and wire harness is sealed to prevent dust and water vapor intrusion and ensure stable signal transmission.