The Buell Firebolt, encompassing the XB9R and XB12R models produced between 2005 and 2008, represents a distinctive chapter in American sportbike engineering. Known for its innovative perimeter frame fuel-tank, underslung exhaust, and aggressive styling, the Firebolt embodies Erik Buell's passion for performance and unique design solutions. Powered by air-cooled, 45-degree V-twin engines, the XB9R features a 984cc powerplant, while the XB12R boasts a larger 1203cc engine, both derived from Harley-Davidson architecture. Key features contributing to its agile handling include a stiff aluminum frame that doubles as the oil reservoir and steering head, a short wheelbase, and Buell's signature Zero Torsion front brake system.

This comprehensive workshop service repair manual in English provides in-depth guidance for maintaining and repairing the Buell Firebolt XB9R and XB12R. It covers all essential systems, from engine mechanicals and management to transmission, brakes, suspension, and electrical systems. The manual details routine maintenance, engine rebuilds, suspension servicing, and electrical diagnostics, offering troubleshooting procedures and diagnostic trouble codes. With extensive torque specifications and a focus on critical maintenance points like belt drive tension, this manual is an indispensable resource for professional technicians and DIY enthusiasts alike, ensuring the longevity and optimal performance of these iconic sportbikes.