This manual covers the KTM 990 Super Duke, produced between 2003 and 2007. Renowned for its aggressive styling and potent performance, the 990 Super Duke is a testament to KTM's heritage in high-performance motorcycles. Featuring a V-twin, four-stroke, liquid-cooled 999 cc engine with electronic fuel injection, it delivers approximately 118 hp and 99 Nm of torque. The motorcycle is built on a chromium-molybdenum steel trellis frame and equipped with WP suspension and a dual front disc braking system, contributing to its exceptional handling and dynamic capabilities. This comprehensive English Workshop Service Repair Manual provides detailed information for DIY enthusiasts and professional technicians. It encompasses general information, engine systems, drivetrain, chassis, and electrical systems, including troubleshooting and wiring diagrams. The manual details disassembly, assembly, cleaning, and reinstallation procedures, offering step-by-step instructions, critical specifications, and numerous illustrations to aid in maintenance and repair. It is designed to facilitate proper upkeep and repair, ensuring the longevity and optimal performance of your KTM 990 Super Duke.