HANQIMOTO The pedal starting gear shaft idle gear assembly is suitable for GY6 49CC 50CC 80CC scooter and light motorcycle starting gear assembly, compatible with 139QMB or P139QMB four stroke engines. Made of reliable materials, it can be installed within seconds, perfectly fitting, stable and sturdy, rust resistant and durable. Our kit ensures optimal performance and reliability for your riding experience. All dimensions are measured manually and there may be slight deviations