This manual covers the Aprilia Type 122 125, a model series renowned for its performance-oriented Rotax 122 engine. This two-stroke, liquid-cooled powerplant, often found in Aprilia's sport and off-road motorcycles from the late 1980s through the 2000s, is recognized for its robust design and tuning potential. The Rotax 122 engine, typically a single-cylinder unit with a displacement around 124.8 cc, features a 6-speed transmission and a wet, multi-plate clutch, making it a capable and versatile engine for its class. Aprilia's strong racing heritage is evident in the engineering of these machines, offering enthusiasts a blend of performance and reliability.

This comprehensive Service Repair Manual provides essential technical data and procedural guidance for the Aprilia Type 122 125 engine. It details maintenance procedures, including scheduled servicing, fluid changes, and component replacements, alongside in-depth repair instructions for engine disassembly and reassembly. The manual also offers troubleshooting guides for common issues and electrical system diagnostics related to engine operation. With its focus on the Rotax 122 engine, this 137-page English manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain and repair these iconic Aprilia models.