This manual covers the TC450, produced for the 2007 and 2008 model years. As a high-performance off-road competition motorcycle, the TC450 is engineered for demanding motocross and enduro riding. It features a liquid-cooled, four-stroke single-cylinder engine, typically around 449cc, designed to deliver strong power and torque for competitive use. The chassis is built around a robust frame, likely chromoly steel or aluminum, paired with advanced adjustable suspension systems, including front forks and a rear monoshock, to provide optimal control and handling on challenging terrain. The heritage in off-road racing underpins the TC450's focus on performance and durability. This Factory Service Repair Manual provides comprehensive guidance for the workshop service and repair of the TC450. It covers all essential systems, including detailed procedures for engine disassembly, assembly, and tuning; transmission maintenance and repair; chassis and suspension servicing; and electrical system diagnostics. The manual also includes information on routine maintenance tasks, troubleshooting common issues, and component overhauls. With its in-depth technical specifications, diagnostic trees, and repair procedures, this manual serves as an indispensable resource for owners, mechanics, and technicians to ensure the proper maintenance, repair, and optimal performance of their TC450 motorcycle.