This manual covers the 125 SX, 200 SX, 125 MXC, 200 MXC, 125 EXC, and 200 EXC models from 1999. These motorcycles are renowned for their performance-oriented design, stemming from a strong heritage in off-road racing. The 125cc and 200cc two-stroke engines, known for their power and agility, are built for demanding motocross and enduro applications. Key features include robust chromium-molybdenum steel perimeter frames, advanced WP suspension systems offering significant travel, and powerful hydraulic disc braking systems. These models embody the 'Ready to Race' philosophy, providing enthusiasts and competitors with reliable and capable machines.

This comprehensive factory service manual provides detailed repair, maintenance, and rebuilding procedures for the specified models. It covers all essential systems, including the engine's top-end and bottom-end components, lubrication, fuel delivery, ignition, and exhaust. Transmission systems, chassis elements such as the frame, suspension, steering, and brakes, as well as electrical systems and bodywork, are thoroughly explained. The manual includes guidance on preventive maintenance, diagnostic procedures, and step-by-step instructions for assembly and disassembly, making it an invaluable resource for owners and technicians aiming to maintain and repair these high-performance off-road motorcycles.