The Aprilia Pegaso 650 Strada and Trail, produced in 2003, represent versatile single-cylinder motorcycles known for their adaptability. These models offer a blend of on-road capability and light off-road potential. The Pegaso line has evolved to incorporate modern technology, featuring a liquid-cooled, 4-stroke, 652 cc engine with electronic fuel injection, typically producing around 48-50 HP. These motorcycles are designed for riders seeking a capable and reliable machine for various riding conditions, emphasizing engineering quality and a user-friendly riding experience. This Factory Service Repair Manual in English provides comprehensive guidance for the Aprilia Pegaso 650 Strada and Trail. It covers all essential aspects of maintenance and repair, including detailed procedures for the engine, fuel system, electrical system, chassis, brakes, and bodywork. The manual includes scheduled maintenance tasks, engine overhaul instructions, troubleshooting diagnostics, and detailed wiring diagrams. Additionally, it offers crucial technical data such as torque specifications, fluid capacities, lubricant requirements, and information on special tools. This resource is invaluable for owners, independent repair shops, and mechanics aiming to maintain and repair their vehicles with OEM-level accuracy and efficiency.