This manual covers the 450 EXC Racing, a high-performance 4-stroke Enduro motorcycle designed for competition and demanding off-road use. Produced between 2000 and 2003, this model is renowned for its powerful engine, premium WP suspension, and robust chromium-molybdenum steel trellis frame, reflecting a strong heritage in off-road racing. Engineered for agility and durability, the 450 EXC Racing offers exceptional performance and rider feedback crucial for competitive enduro and cross-country events. This comprehensive workshop service and repair manual provides detailed guidance for maintenance, diagnostics, troubleshooting, and component replacement. It covers all major systems including the engine, transmission, chassis, brakes, and electrical systems, offering step-by-step procedures for everything from routine oil changes to complete engine rebuilds. This manual is an essential resource for owners, mechanics, and technicians to ensure the optimal performance, reliability, and longevity of their 450 EXC Racing.