The SM 400 R, produced for the 2003-2004 model years, represents a performance-oriented Supermoto motorcycle that blends aggressive styling with agile handling. Evolving from a strong off-road heritage, this model was engineered for riders seeking a potent single-cylinder engine, advanced suspension, and capable braking systems for spirited street riding. Its lightweight chassis and responsive power delivery positioned it competitively against other premium Supermoto offerings, emphasizing a focus on rider control and an exhilarating riding experience. This comprehensive Service Repair Workshop Manual provides extensive coverage for all repairs, from routine maintenance to major overhauls, for the SM 400 R models within its production range. It details essential procedures for engine and clutch systems, transmissions, cooling, fuel, and electrical systems, alongside in-depth guidance for brakes, wheels, tires, steering, suspension, and frame components. With clear, high-quality diagrams and professional-level technical information, this manual serves as an indispensable resource for owners and technicians to ensure the optimal performance, reliability, and longevity of the vehicle.