The 2004 XB9R Firebolt is a performance-oriented sportbike, known for its unique chassis design that integrates the oil-in-frame concept and a powerful air-cooled V-twin engine. This model, manufactured in East Troy, Wisconsin, USA, draws from Erik Buell's vision of creating agile and dynamically capable motorcycles. The XB9R is distinguished by its signature 'Truss' frame, the distinctive 'Zero Torsional Load' (ZTL) front brake system featuring a large 375mm disc and a 6-piston caliper, and a 984cc V-twin engine derived from Harley-Davidson's Evolution platform. It offers a compelling blend of aggressive styling, sharp handling, and potent braking, positioning it as a distinctive choice in the sportbike market. This comprehensive Service Repair Manual is designed to provide detailed guidance for the maintenance, repair, and troubleshooting of the 2004 XB9R Firebolt. It covers all essential systems, including the engine, fuel system, ignition, electrical components, chassis, suspension, brakes, and drivetrain. Within its pages, you will find in-depth procedures for engine mechanical work, carburetor tuning, electrical diagnostics, suspension servicing, and brake maintenance, all supported by precise torque specifications and detailed wiring diagrams. The manual also includes preventative maintenance schedules and addresses common known issues, making it an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of their XB9R Firebolt.