This manual covers the GS250 motorcycle, a model produced between 1985 and 1990. As part of the esteemed GS series, this first-generation model is recognized for its reliable performance and versatile application, often serving as an entry-level sport or standard motorcycle. Engineered during a period of significant innovation in motorcycle technology, the GS250 embodies a commitment to quality and performance in its class. Its design, featuring a vertical twin-cylinder, four-stroke engine with a displacement of approximately 249cc, DOHC valve train, and air cooling, contributed to its reputation for dependability and enjoyable riding. This comprehensive workshop service manual is designed to assist both mechanics and DIY enthusiasts in the maintenance and repair of the GS250. The manual provides in-depth coverage of all major systems, including the engine, transmission, fuel system, electrical system, suspension, brakes, and chassis. Within its over 120 pages, users will find detailed procedures for routine maintenance, troubleshooting common issues, component disassembly and assembly, adjustments, and complete overhauls. Technical specifications, wiring diagrams, and safety guidelines are also included, ensuring that all repair and maintenance tasks are performed correctly and efficiently, enabling owners to keep their GS250 in optimal condition.