The Ducati Monster S2R 800 and S2R 800 DARK, produced between 2005 and 2007, represent an iconic naked sportbike known for its distinctive trellis frame and powerful L-twin engine. These models embody Ducati's philosophy of performance, style, and a visceral riding experience, powered by an air-cooled, 799 cc Desmodromic engine that delivers approximately 77 horsepower. With a focus on agility and rider engagement, the S2R variants often featured higher-specification components, making them a popular choice for enthusiast riders seeking a machine with a strong character and celebrated Italian engineering. This comprehensive manual serves as an essential resource for the Ducati Monster S2R 800 and S2R 800 DARK, covering all aspects of service, repair, and parts identification. It details routine maintenance procedures, including oil changes and belt replacements, as well as in-depth repair instructions for the engine, transmission, chassis, brakes, and electrical systems. The manual also provides crucial troubleshooting guidance, technical specifications, and exploded views, empowering owners and technicians to effectively maintain, diagnose, and repair these performance motorcycles to factory standards.