CG125 motorcycle lower rocker arm aluminium alloy top rod engine lower rocker arm assembly

CG125 rocker arm, rocker arm length 168mm, shaft hole diameter 18mm, mounting hole positions and rocker contact groove dimensions perfectly match the original engine cylinder block and rocker, allowing direct replacement without modification, suitable for 125cc single-cylinder pushrod engine valve system; made from ADC12 reinforced aluminium alloy die casting, tensile strength ≥300MPa, 20% more rigid than ordinary aluminium alloy, weighing only about 320g, balancing lightweight and impact resistance, preventing deformation under heavy load or bumpy conditions; rocker contact groove is high-frequency quenched (hardness HRC48-52), with built-in high-quality steel sleeve bearing, clearance ≤0.02mm, rotates smoothly without sticking, wear ≤0.01mm per 10,000 km, transmission efficiency increased by 15%; overall rocker arm dynamic balance error ≤0.06mm, low vibration and noise during operation, solving issues of pushrod noise and valve timing deviation caused by worn old rocker arms; surface treated with anodising and electrophoresis, salt spray resistance ≥96 hours, suitable for high temperature, oily and humid engine environments, not easily oxidised or rusted with long-term use