The FS450C and FS650C models represent high-performance Supermoto motorcycles from the 2001-2003 production years. These machines are characterized by their lightweight, agile design and powerful single-cylinder, 4-stroke engines, typically featuring DOHC valve trains and Keihin FCR carburetors. Known for their aggressive street riding and track capabilities, motorcycles of this era were praised for their potent engines and exceptional handling, often incorporating high-quality components like WP suspension and Brembo brakes. The brand's heritage, rooted in Swedish off-road excellence and later influenced by KTM, contributed to the development of these specialized, performance-oriented machines.

This comprehensive service repair manual provides essential information for the maintenance and repair of the FS450C and FS650C. It covers all aspects of engine service, including complete disassembly, assembly, inspection, and repair procedures. Detailed guidance is offered for the fuel system, lubrication system, cooling system, ignition system, and exhaust system, alongside routine maintenance tasks and troubleshooting diagnostics. The manual includes critical technical specifications, clearances, tolerances, and torque values necessary for accurate work. Its scope extends from basic upkeep to complete engine overhauls, making it an indispensable resource for owners and technicians aiming to preserve the performance and longevity of these specialized motorcycles.