The 2004 Buell XB12S Firebolt is a distinctive motorcycle known for its innovative engineering and performance-oriented design. Developed by the Buell Motorcycle Company, founded by Erik Buell, this model embodies a unique approach to motorcycle construction, featuring elements like the 'Zero Drag' frame that doubles as an oil reservoir and an underslung exhaust system. With its aggressive styling and a powerful air-cooled, 45-degree V-twin engine displacing 1203 cc, the XB12S Firebolt offers a compelling blend of power and agile handling, making it a standout in the sportbike category. Its heritage is rooted in a strong affiliation with Harley-Davidson, contributing to its robust build quality and performance capabilities. This comprehensive factory service repair workshop manual, written in English, provides complete service and repair information for the 2004 Buell XB12S Firebolt. It covers all major systems, including engine mechanicals, fuel and electrical systems, drivetrain, brakes, suspension, steering, and frame. The manual offers extensive diagnostic procedures, troubleshooting guides, routine maintenance schedules, and detailed step-by-step repair instructions. With hundreds of photos and illustrations, along with critical technical specifications and torque values, this manual is an indispensable resource for do-it-yourself owners and professional mechanics alike, ensuring the proper maintenance and repair of the vehicle.