CG125 motorcycle magneto rotor; 1:1 replica of the CG125 original specification, with taper hole taper (1:5), internal teeth / threaded interface fully matching the crankshaft, no modification required for direct replacement, suitable for most 125cc single-cylinder pushrod engines; the inner wall is embedded with 8 high-purity neodymium iron boron magnets, magnetic flux ≥120mT, high generation efficiency, output power 70-100W, ensuring stable power supply for ignition, lights, instruments and other electrical systems; surface treated with blackening and anti-rust oil for dual protection, salt spray test ≥72 hours, resistant to engine compartment oil, high temperature and humidity corrosion, not easy to rust; integrated trigger tooth structure, cooperating with the trigger coil, ignition advance angle controlled at 15°±1.5°~30°±2°, ensuring stable ignition within the engine speed range of 350-11000r/min