This workshop service repair manual covers the GF 125, a model known for its presence in the 125cc sport/naked motorcycle segment. Developed by Motors & Machinery Inc. of South Korea, the GF 125 typically features a single-cylinder, 4-stroke engine with a displacement of 125cc, likely employing a manual transmission. This manual provides comprehensive information for owners and technicians. This comprehensive English-language workshop service repair manual offers detailed procedures for all models, engines, trims, and transmission types. It covers a wide array of systems, including general information, fuel, cooling, engine top-end, clutch, lubrication, removal and installation, crankshaft, transmission, wheels, tires, final drive, brakes, suspension, steering, frame, chassis, and the electrical system, along with an appendix. The manual includes detailed maintenance instructions, troubleshooting guides, repair procedures, disassembly and assembly steps, cleaning, reinstallation, and wiring diagrams, all presented with hundreds of illustrations and professional-level technical depth.