This workshop service manual provides comprehensive repair and maintenance information for the GF125, a model known for its reliable performance in the commuter and sport-styled motorcycle segment. Engineered by a reputable Korean manufacturer, the GF125 is designed for practical urban use and everyday riding. While specific production years are not detailed, this manual covers the essential aspects of this model, enabling owners and technicians to understand its mechanics and ensure its longevity. This manual serves as an indispensable resource for maintaining and repairing the GF125. It details engine overhaul procedures, transmission service, electrical system diagnostics including wiring diagrams, and maintenance for the chassis, suspension, braking, fuel, cooling, exhaust, and body systems. With step-by-step instructions, troubleshooting guides, and periodic maintenance schedules, this document empowers both professional technicians and do-it-yourself enthusiasts to perform a wide range of service tasks efficiently, ensuring the vehicle remains in optimal condition.