This manual covers the GSX400F, also known as the GSX400, a mid-size sport motorcycle produced between 1982 and 1983. As part of the renowned GSX line, this model was engineered for performance and versatility, making it a popular choice among enthusiasts. Its air-cooled, 4-stroke, DOHC inline-4 cylinder engine, displacing approximately 398 cc, provided an estimated 40-45 horsepower, offering a spirited riding experience characteristic of sportbikes from its era. The GSX400F featured a robust steel frame, a 5-speed transmission, chain drive, and a wet, multi-plate clutch, all contributing to its reliable and engaging performance.

This comprehensive factory service manual provides detailed information for the maintenance, repair, and troubleshooting of the GSX400F. Spanning 292 pages, it covers all major systems, including the engine, fuel system, lubrication, electrical components, transmission, suspension, brakes, and chassis. The manual offers step-by-step instructions for procedures such as engine overhaul, carburetor adjustment, valve clearance checks, and electrical diagnostics, along with scheduled maintenance tasks and fluid specifications. Its purpose is to equip owners, mechanics, and technicians with the knowledge necessary to keep this classic motorcycle in optimal condition, ensuring its longevity and performance.