This manual covers the KTM 400 EXC, 450 EXC, SMR, and SXS models produced between 2000 and 2007. These high-performance motorcycles, known for their Austrian engineering and racing heritage, feature liquid-cooled, four-stroke single-cylinder LC4 engines with displacements around 400cc and 450cc. They are designed for demanding off-road and supermoto applications, offering robust performance and reliability. Key features include powerful engines, advanced WP Suspension components, and high-performance hydraulic disc brakes, embodying KTM's 'Ready to Race' philosophy.

This comprehensive factory service and repair workshop manual provides essential information for owners, mechanics, and technicians. It details all aspects of maintenance, from routine servicing like oil changes and filter replacements to in-depth repairs, including complete engine and transmission overhauls. The manual covers the engine, transmission, electrical systems, chassis, suspension, braking system, and bodywork, along with troubleshooting guides and critical technical specifications such as torque values and fluid capacities. Its detailed procedures and diagrams are crucial for maintaining the optimal performance and longevity of these specialized KTM motorcycles.