This workshop service manual provides comprehensive guidance for the Rapier 450, model code TE450, a sport/off-road motorcycle known for its single-cylinder, 4-stroke, liquid-cooled 450cc engine. Engineered for mechanics and DIY enthusiasts, this manual focuses on enabling satisfactory after-services and efficient repair. It covers all essential systems including the engine, transmission, chassis, suspension, braking, fuel, cooling, exhaust, and bodywork, offering detailed repair, adjustment, and maintenance procedures designed for optimal vehicle performance and longevity. The scope of this 262-page English-language manual is extensive, encompassing everything from routine maintenance schedules and procedures to in-depth troubleshooting, disassembly, assembly, and component testing. It features step-by-step instructions, clear explanations, and pictorial diagrams, including exploded views and photos, to simplify complex tasks. Safety is paramount, with dedicated sections for NOTES, CAUTIONS, and WARNINGS to prevent damage and ensure safe operation. This manual serves as an indispensable resource for mechanics and owners alike, facilitating accurate diagnosis, repair, and maintenance for the Rapier 450.