The 2004 Firebolt XB12R is a performance-oriented sportbike renowned for its innovative engineering, including signature chassis integration and the potent V-twin engine. This model, part of the XB Series produced from 2003 to 2010, offers a unique blend of American V-twin power with sports-focused handling, distinguishing it from its contemporaries. With a 1203 cc air-cooled V-twin engine, electronic fuel injection, and a robust frame that doubles as an oil reservoir, the Firebolt XB12R was designed for riders seeking exhilarating performance and distinctive styling, positioning it within the sportbike segment alongside competitors like Ducati's Monster series. This comprehensive workshop service manual provides essential guidance for the maintenance and repair of your 2004 Firebolt XB12R. It covers all critical systems, including detailed procedures for the engine, fuel, ignition, transmission, braking, electrical, and cooling systems, as well as chassis and bodywork. The manual includes step-by-step repair instructions, disassembly and assembly guides, troubleshooting diagnostics, and necessary adjustments, supported by clear wiring diagrams and specifications for special tools. This resource is invaluable for owners and technicians aiming to ensure the optimal performance, reliability, and longevity of the vehicle.