YBR125 motorcycle rocker arm assembly, rocker arm size, valve contact end radian and YBR125 camshaft/valve fully match, 2 sets of strict standard of the original factory quantity, direct replacement without adjusting the valve mechanism; Adopt precision cast steel molding, surface quenched treatment, high hardness, anti-wear, suitable for high frequency valve opening and closing conditions; The rocker arm end is integrated with valve clearance adjustment screw, which can be directly adjusted after installation, saving the trouble of purchasing additional accessories; Precise arm length and radian design ensure accurate opening and closing timing of the valve and improve engine intake and exhaust efficiency and power performance.