This manual covers KTM 400 EXC, 450 EXC, SMR, and SXS models produced between 2000 and 2007. These high-performance motorcycles, built in Austria, are renowned for their lightweight chassis, powerful LC4 single-cylinder engines, and advanced WP suspension, making them versatile for motocross, enduro, and supermoto applications. KTM's racing heritage is evident in the design, emphasizing a 'Ready to Race' philosophy. The LC4 engine platform, a cornerstone of KTM's lineup, has been a reliable and potent unit across various displacements and chassis configurations, offering a competitive edge against other leading off-road manufacturers.

This comprehensive workshop service repair manual, written in English, provides detailed information for maintaining and repairing your KTM motorcycle. It covers essential areas including engine overhaul, transmission and drivetrain, chassis and suspension, braking system, electrical system, and fuel system. The manual includes routine maintenance procedures, in-depth repair procedures, and troubleshooting guides for common issues. With over 500 pages of content, it serves as an indispensable resource for owners and technicians alike, ensuring optimal performance and longevity of these specialized LC4 series vehicles.