This manual pertains to the 400 SX, a performance motocross motorcycle manufactured between the years 2000 and 2007. Renowned for its powerful 4-stroke, single-cylinder engine and agile handling, the 400 SX was engineered for competitive motocross racing. Its heritage is rooted in a strong off-road racing pedigree, with this model representing a dedicated motocross platform known for its robust construction and rider-focused design. The vehicle features a liquid-cooled engine, a 5-speed manual transmission with a wet multi-plate clutch, and hydraulic disc brakes front and rear, all built upon a strong chromoly steel frame.

This comprehensive Service Repair Workshop Manual provides detailed guidance for owners, mechanics, and technicians. It covers essential maintenance procedures, including routine inspections, oil changes, filter replacements, and chain adjustments, as well as in-depth repair and rebuild instructions for all major systems. Key areas addressed include engine, fuel, ignition, cooling, transmission, clutch, suspension, brakes, electrical systems, frame, wheels, and bodywork. The manual also offers troubleshooting charts for common issues, technical specifications such as torque values and fluid capacities, and wiring diagrams, ensuring the vehicle remains in optimal condition and performance.