The Hyosung GF125 is a 125cc naked sportbike designed for entry-level to mid-range riders, offering a blend of performance, reliability, and value. Manufactured in South Korea, this model is characterized by its single-cylinder, air-cooled engine, manual 5-speed transmission, and a sporty aesthetic suitable for urban commuting and general riding. Key features include front and rear hydraulic disc brakes and a capable suspension system. While specific production years are not detailed, the GF125 has been a consistent offering in its segment, known for its core functionality and affordability.

This comprehensive Service Manual / Repair Manual in English provides detailed guidance for the maintenance and repair of the Hyosung GF125. It covers essential areas such as periodic maintenance, tune-up procedures, engine servicing, fuel and lubrication systems, electrical systems, and chassis servicing. The manual includes step-by-step instructions for routine checks, adjustments, engine overhaul, carburetor tuning, electrical system diagnosis, brake servicing, and troubleshooting common issues. It is an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of their GF125.