This manual covers the 990 Super Duke, a high-performance naked sportbike produced between 2003 and 2005. Renowned for its raw power, aggressive styling, and exceptional handling, the 990 Super Duke embodies a commitment to rider engagement. Featuring a potent 999 cc V-twin LC8 engine, this motorcycle is designed for enthusiast riders seeking an exhilarating experience. Its agile chassis and dynamic performance place it among the top contenders in its class, offering a potent blend of speed and control. This comprehensive service and repair manual provides detailed information essential for maintaining and repairing your 990 Super Duke. It covers all major systems, including engine mechanicals, fuel and ignition systems, cooling, transmission, brakes, suspension, and electrical components. Within its pages, you will find step-by-step repair procedures, preventive maintenance schedules, troubleshooting guides, and technical specifications. This manual is an indispensable resource for owners, mechanics, and technicians aiming to ensure the optimal performance and longevity of this exceptional machine.