This comprehensive factory service repair manual is dedicated to the Aprilia Pegaso 650 Strada and Trail models. Known for their versatility, these motorcycles are designed for both urban commuting and light off-road adventures, particularly the Trail variant. The Pegaso platform, originating in the early 1990s, features a robust 652 cc single-cylinder, four-stroke engine, typically a variant, delivering approximately 48-50 HP and 60-63 Nm of torque. The Strada and Trail models offer distinct capabilities, with the Trail variant providing increased ground clearance for enhanced off-road performance. This manual aims to provide owners and technicians with the in-depth knowledge required to maintain and repair these capable machines. This manual covers a wide array of critical systems and procedures essential for the upkeep of your Aprilia Pegaso 650. Within its pages, you will find detailed instructions for engine disassembly and assembly, including all major components like the crankshaft, piston, and cylinder head. It also details maintenance for the cooling, lubrication, fuel, ignition, clutch, electrical, chassis, suspension, and brake systems. Furthermore, the manual outlines scheduled maintenance, troubleshooting diagnostics for common issues such as potential voltage regulator faults, and step-by-step repair operations for component overhaul. With clear, factory-level guidance, this manual empowers you to perform all necessary maintenance and repairs efficiently and effectively.