This manual covers 400 EXC, 450 EXC, SMR, and SXS models manufactured between 2000 and 2007. These high-performance motorcycles, built around the robust LC4 engine architecture, are renowned for their powerful, torquey performance and exceptional off-road capability. Featuring premium WP suspension for superior damping and adjustability, along with agile chassis designs, these bikes are engineered for demanding terrain and competitive use. Whether for Enduro, Motocross, or Supermoto applications, motorcycles of this era are recognized for their racing heritage and handling prowess, with a strong emphasis on rider control and durability.

This comprehensive Workshop Service Manual provides detailed information essential for the maintenance, repair, and troubleshooting of your motorcycle. It covers a wide array of systems, including engine mechanicals, fuel and ignition systems, transmission, drivetrain, suspension, brakes, and the electrical system. Within its pages, you will find procedures for routine maintenance, in-depth engine rebuilds, suspension and brake servicing, and electrical diagnostics. The manual also includes technical specifications, torque values, and troubleshooting charts, enabling owners and technicians to effectively maintain and restore these high-performance machines to optimal working condition.