This manual covers the GF125, a street motorcycle known for its reliable air-cooled, 4-stroke, single-cylinder engine. Typically produced in the late 1990s to early 2000s, the GF125 is designed for general street riding. Its engineering prioritizes a balance of performance and durability for everyday use, featuring a 5-speed manual transmission with a wet multi-plate clutch and chain drive. The motorcycle is equipped with a front disc brake and a rear drum brake, supported by a comprehensive electrical system including essential lighting for safety. This comprehensive service repair workshop manual provides A-Z repair, maintenance, diagnosis, and servicing information for all GF125 models. It is written in English and offers factory-level detail, making it suitable for both dealership technicians and experienced DIY enthusiasts. The manual includes extensive coverage of all major systems, such as the engine, fuel system, ignition, transmission, chassis, brakes, and electrical components. It details procedures for regular service checks, component overhauls, diagnostic troubleshooting, and adjustments, all supported by richly illustrated diagrams and step-by-step instructions to ensure proper maintenance and repair.