The Hyosung GF 125 is an entry-level sport-styled motorcycle produced from 2000 to 2005. Designed to offer sporty aesthetics and accessible performance, it has been popular in various markets for commuting and light sport riding. This model features a four-stroke, single-cylinder, air-cooled engine with a displacement of 124 cc, delivering approximately 10-12 horsepower. Its engineering emphasizes a balance of economy and visual appeal, drawing inspiration from larger sportbike designs. The GF 125 is equipped with a 5-speed transmission, a wet multi-plate clutch, and a chain final drive, supported by a steel diamond frame for its chassis construction.

This comprehensive workshop service manual provides detailed guidance for the maintenance, repair, and diagnosis of the Hyosung GF 125 motorcycle. Covering all major systems including the engine, fuel system, transmission, electrical system, brakes, and suspension, it offers step-by-step procedures for routine maintenance, component overhauls, and troubleshooting. The manual includes essential technical specifications, wiring diagrams, and information on common wear items and potential issues. Its purpose is to assist owners, mechanics, and technicians in keeping the GF 125 in optimal working condition, ensuring reliability and performance throughout its service life.