This manual covers the SM 400, SM 450, and SM 510 R models produced for the 2006 and 2007 model years. These Supermoto motorcycles are renowned for their potent single-cylinder, 4-stroke, liquid-cooled engines, offering displacements of approximately 400cc, 450cc, and 510cc respectively. With a heritage dating back to 1903, the brand is known for its high-performance off-road and competition machines. The SM series adapts this expertise for street performance, featuring robust chassis designs, advanced suspension, and powerful braking systems, making them a popular choice for spirited riding and performance enthusiasts. This comprehensive Service Repair Workshop Manual in English provides detailed guidance for all maintenance and repair procedures. It covers essential systems including the engine, clutch, transmission, cooling, fuel, exhaust, ignition, and electrical systems, as well as brakes, wheels, tires, steering, suspension, and frame. The manual includes systematic troubleshooting guides, diagnostic procedures, and detailed, color-coded wiring diagrams. With a focus on professional quality and a substantial number of illustrations, this manual is an indispensable resource for owners and technicians seeking to maintain, repair, and optimize their Supermoto motorcycles.