This manual covers the Hyosung GF125, a motorcycle model produced from 1997 onwards. Designed for entry-level riders and commuters, the GF125 typically features a reliable 125cc four-stroke, single-cylinder, air-cooled engine, often paired with a multi-plate wet clutch and a 5-speed or 6-speed gearbox. Its engineering prioritizes a balance of performance and affordability, making it a popular choice in its segment. The vehicle's construction is robust for its class, with a focus on ease of maintenance and operation. This comprehensive Service Repair Workshop Manual provides detailed, A-Z coverage for all GF125 models from 1997 onwards. It is designed to assist DIY mechanics, professional technicians, and motorcycle enthusiasts in maintaining and repairing their vehicles. The manual includes in-depth procedures for engine and clutch, transmissions, cooling systems, fuel and exhaust, ignition and electrical systems, brakes, wheels and tires, steering and suspension, and frame and bodywork. Additionally, it offers fault-finding and troubleshooting guides, routine maintenance schedules, and high-quality diagrams and pictures to illustrate all repair processes.