This manual covers 125 SX, 200 SX, SXS, and MXC models produced between 1999 and 2006. These competition-focused, two-stroke motorcycles are renowned for their high performance, lightweight design, and aggressive power delivery, making them favorites in motocross and off-road racing. The heritage in off-road competition is evident in the engineering of these models, which were continuously refined to deliver peak performance and rider engagement.

This comprehensive service and repair manual provides detailed guidance on all aspects of maintaining and troubleshooting these motorcycles. Its scope includes in-depth coverage of engine service and repair, including complete disassembly and reassembly of internal components, as well as maintenance for the cooling system, fuel system, ignition, and exhaust. Additionally, the manual details routine maintenance procedures, engine overhaul, troubleshooting common issues, and component testing, making it an essential resource for owners and technicians seeking to preserve the performance and longevity of their vehicles.