This manual covers the 1999 400, 501, and 600 models, renowned performance off-road motorcycles. Known for their lightweight construction and powerful four-stroke, single-cylinder engines with DOHC valve trains, these bikes were designed for demanding enduro and cross-country conditions. During their production, motorcycles, which were acquired by another company in 1995, competed with major brands like other manufacturers, Yamaha, Honda, Suzuki, and Kawasaki. The 1999 lineup represented the core of offerings, emphasizing robust engineering and capable suspension systems, often featuring specific components, to deliver excellent performance in challenging terrains.

This comprehensive Service and Repair Manual in English provides detailed guidance for maintaining and repairing all major mechanical and electrical systems of the 1999 400, 501, and 600 models. It covers routine maintenance, disassembly and assembly procedures, engine and transmission overhauls, fuel and ignition systems, suspension, braking, and electrical systems, including wiring diagrams. The manual is an essential resource for owners, mechanics, and technicians, offering step-by-step instructions, crucial torque specifications, and diagnostic information to ensure the optimal performance, reliability, and longevity of these off-road machines.