YBR125 motorcycle teeth, center hole 64MM, installation hole distance 80MM and YBR125 rear axle fully match, directly replace the original teeth without adjusting the installation position; The sprocket is stamped with hardened steel, with high hardness and abrasion resistance, which is suitable for the transmission condition of long-term chain engagement. Wheel body with hollow holes, reduce weight while ensuring structural strength, reduce transmission resistance, improve dynamic response; Tooth shape and transmission chain meshing gap is accurate, no transmission lag, no abnormal sound, to ensure the efficiency of power transmission; After aligning the rear axle to install the locking nut, it can be naturally adapted to the small teeth and chain, and the operation is simple and efficient.