This manual covers the 990 Super Duke RA LC8 E models produced between 2003 and 2005. As a performance naked motorcycle, the 990 Super Duke is recognized for its aggressive styling, rider-focused ergonomics, and high-performance capabilities, driven by its liquid-cooled, 999 cc V-twin LC8 engine. Known for its potent V-twin power delivery and sharp handling, it was a significant entry in the sportbike category, competing with models from Ducati, Triumph, and Aprilia. The engineering quality of a brand renowned for its off-road and racing heritage, is evident in the performance and design philosophy of this model, making it a sought-after machine for enthusiast riders. This comprehensive Service Repair Manual provides detailed technical information essential for the maintenance, diagnosis, and repair of the 990 Super Duke RA LC8 E. It covers all major systems, including the engine, transmission, chassis, brakes, and electrical system, offering step-by-step instructions for procedures such as complete overhauls, scheduled maintenance tasks, and troubleshooting common faults. The manual includes critical data like torque specifications, fluid requirements, and wiring diagrams, ensuring that owners, mechanics, and technicians can effectively maintain and repair the vehicle to factory standards. Its scope ranges from basic service to in-depth component repair, making it an indispensable resource for preserving the performance and longevity of your motorcycle.