YBR125 motorcycle meter gear set, active teeth, driven teeth tooth shape and installation size fully match YBR125 front wheel/odometer drive system, direct replacement without adjusting clearance; The combination of active teeth (shaft teeth) + driven teeth (ring teeth) can accurately engage with the front axle and odometer line to ensure stable transmission of mileage data; The gear adopts hardened steel + engineering plastic composite material, the tooth surface is resistant to wear and deformation, suitable for long-term high-frequency transmission conditions; The active teeth are mounted on the front axle and the driven teeth are connected with the odometer line, which can be fixed after alignment and engagement. The operation is simple and efficient. The gear mesh clearance is accurate, and the transmission is not skid, which ensures the odometer reading is accurate and avoids the deviation of mileage data.