This manual covers the 125 SX, 200 SX, 125 SXS, 200 SXS, 125 MXC, and 200 MXC models produced between 1999 and 2006. These models are known for their high-performance, competitive engineering, and rider ergonomics, reflecting a commitment to off-road excellence. The 2-stroke, single-cylinder engines, available in approximately 125cc and 200cc displacements, are liquid-cooled and feature a 6-speed manual transmission with hydraulic clutch actuation. These motorcycles are built on a robust chromoly steel perimeter frame, providing a foundation for their agility and durability in demanding off-road conditions. This comprehensive service repair workshop manual provides detailed information essential for the maintenance and repair of your motorcycle. It covers all major systems, including the engine, transmission, drivetrain, electrical system, suspension, steering, and bodywork. Within its pages, you will find step-by-step instructions for routine maintenance, periodic checks, fluid changes, and in-depth repair procedures for engine rebuilds and transmission overhauls. The manual also includes advanced troubleshooting guides, diagnostic procedures, detailed specifications, and wiring schematics, enabling owners and technicians to effectively maintain and repair these vehicles, ensuring optimal performance and longevity.