The Aprilia Pegaso 650, a versatile Adventure/Enduro motorcycle produced in 2004, is powered by a liquid-cooled, single-cylinder, four-stroke engine with a displacement of approximately 652 cc. Known for its robust engineering and suitability for both on-road touring and light off-road exploration, the Pegaso 650 offers a blend of performance and comfort. Key features include electronic fuel injection, a 5-speed transmission, and a chain-driven final drive, making it a capable and reliable machine for a variety of riding conditions. An Italian manufacturer with a heritage in performance motorcycles, the Pegaso line was designed to cater to riders seeking a practical yet engaging riding experience. This factory service repair manual provides comprehensive workshop-level guidance for the 2004 Aprilia Pegaso 650. It covers essential maintenance procedures, detailed repair information for all major systems including the engine, fuel system, cooling system, electrical system, and chassis. The manual includes step-by-step instructions, diagrams, torque specifications, fluid capacities, and troubleshooting guides to assist owners, mechanics, and technicians in performing routine maintenance, diagnostics, and repairs accurately and efficiently. Its thorough coverage aims to ensure the longevity and optimal performance of the Pegaso 650.