The 400 is a high-performance, liquid-cooled, 2-stroke, single-cylinder off-road motorcycle, produced in 1999. Renowned for its potent power delivery and lightweight design, this model embodies a commitment to off-road capability and racing heritage. Featuring robust suspension components and a chromoly steel frame, the 400 was engineered for demanding enduro and motocross environments, placing it competitively against other leading off-road brands of its era. Its design philosophy focused on delivering a potent and agile riding experience, making it a capable machine for both competitive racing and challenging terrain.

This comprehensive Service Repair Manual provides detailed guidance for the 400, model year 1999. It is intended for professional technicians and experienced DIY mechanics seeking to maintain and repair this off-road motorcycle. The manual covers essential areas including in-depth engine and transmission overhaul, chassis and suspension system maintenance, brake system servicing, and electrical system diagnostics with detailed wiring diagrams. It offers step-by-step repair instructions, adjustment procedures, and troubleshooting guides for common issues, ensuring owners and mechanics can effectively manage the upkeep and longevity of their 400.