CG125 motorcycle clutch large gear, 1:1 replica of the CG125 original specification, 8-slot 73-tooth standard design, spline size and mounting holes match the crankshaft and clutch small gear 100%, directly replacing the old parts without modification; teeth are precisely machined by CNC, tooth gap ≤0.02mm, uniform engagement depth, power transmission without play or slipping, ensuring smooth starting and shifting; the overall structure has been tested for dynamic balance and can withstand the centrifugal force of high-speed engine operation, preventing tooth deformation or breakage under heavy load or climbing; comes with a spline washer and fixing bolts, align with the crankshaft interface and simply clamp and tighten, no special tools required, easy for beginners to install; surface treated with blackening and anti-rust oil for dual protection, salt spray test ≥72 hours, suitable for high-temperature and oily engine environments, long-term use without rusting