The Aprilia Pegaso 650 Strada and Trail models, produced from 1997 onward, represent versatile lightweight adventure touring and dual-sport motorcycles. Powered by a robust Rotax 654 single-cylinder engine, these bikes are engineered for riders seeking a capable machine for both daily commuting and exploring unpaved roads. Available in road-biased Strada and off-road focused Trail variants, the Pegaso line offers a balanced performance profile, characterized by its strong low-end torque and manageable power delivery, making it a reliable choice for a variety of riding conditions. This comprehensive service and repair manual provides detailed guidance for the Aprilia Pegaso 650 Strada/Trail models. It covers essential maintenance procedures, in-depth troubleshooting, diagnostic strategies, and critical technical specifications. The manual is designed to assist owners and technicians in effectively maintaining, repairing, and optimizing the performance of their motorcycle, ensuring its longevity and reliability through step-by-step instructions for all major systems, including the engine, transmission, brakes, suspension, and electrical components.