This manual covers the KTM 400 SX Racing motorcycle, produced for the 2000, 2001, 2002, and 2003 model years. As a competition motocross and off-road motorcycle, the 400 SX Racing features a liquid-cooled, four-stroke, single-cylinder 400cc engine designed for high performance and responsiveness. KTM, an Austrian manufacturer with a strong racing heritage, engineered this model to excel in demanding off-road environments and motocross racing. Its robust construction and potent engine made it a competitive choice in its class during its production run.

This comprehensive service repair manual focuses primarily on engine service and repair for the KTM 400 SX Racing. It provides detailed procedures for engine mechanical and electrical systems, including complete disassembly, inspection, repair, and reassembly. The manual also covers the fuel system, cooling system, lubrication system, exhaust system, and internal transmission components. With in-depth troubleshooting guides, diagnostic information, and critical technical specifications such as torque values and fluid capacities, this manual is an essential resource for owners, mechanics, and technicians to maintain and repair their 400 SX Racing models effectively.