This manual covers the KTM 400 SX Racing, a competition motocross motorcycle produced for the model years 2000, 2001, 2002, and 2003. Engineered in Austria, the 400 SX Racing is a four-stroke, single-cylinder machine renowned for its aggressive power delivery and agile handling, designed for the demanding environment of motocross racing. It competed against leading models from other manufacturers during its production era, embodying KTM's "Ready to Race" philosophy with a focus on performance and reliability in competitive off-road conditions.

This comprehensive Factory Service Repair Manual provides detailed information for qualified technicians and experienced DIY mechanics. It covers all essential aspects of the KTM 400 SX Racing, including engine overhaul, powertrain systems, chassis and suspension, electrical systems, and bodywork. The manual details routine maintenance procedures, repair and overhaul processes, troubleshooting guidance, and critical technical specifications such as torque values and fluid capacities. Its purpose is to assist users in maintaining, diagnosing, and repairing the vehicle to ensure optimal performance and longevity.