This manual covers the 400 SX Racing, a high-performance four-stroke motocross bike produced for the model years 2000 through 2003. Renowned for its robust LC4 engine platform, this competition-focused machine offered strong mid-range torque and a competitive chassis, making it a formidable choice for motocross racers and off-road enthusiasts. The legacy in off-road competition is evident in the engineering of this model, which was designed to challenge the leading Japanese manufacturers of its era. Its lightweight construction and powerful, liquid-cooled, single-cylinder engine were optimized for the demands of motocross racing.

The purpose of this comprehensive Workshop Service Repair Manual is to provide detailed guidance for the maintenance, repair, and troubleshooting of the 400 SX Racing. It covers all essential systems, including the engine, transmission, chassis, fuel system, electrical system, braking system, and exhaust. The manual offers step-by-step procedures for routine maintenance, component rebuilds, and technical specifications, ensuring that owners and technicians can maintain the vehicle's optimal performance and longevity. With factory-level detail, this resource is an indispensable tool for anyone working on this competition motorcycle.