The Aprilia Engine Rotax 122 Full Service Repair Manual is a comprehensive guide designed to empower you with the knowledge and instructions necessary to repair, maintain, rebuild, refurbish, or restore your Aprilia Engine Rotax 122. This manual delves deep into every aspect of your engine, providing detailed diagnostic and repair procedures that are typically reserved for professional technicians. Structured for clarity and ease of use, the manual features numbered instructions guiding you through each step of every repair procedure. Detailed illustrations, drawings, and photos accompany these steps, offering visual support for a thorough understanding. Enlarged insets highlight key parts in detail, ensuring precise identification and examination. To facilitate quick access to the information you need, a numbered table of contents is provided. Troubleshooting and electrical service procedures are seamlessly integrated with detailed wiring diagrams for simplified diagnosis and repair. This manual equips you to confidently tackle even the most complex electrical issues.

The Aprilia Rotax 122 engine is a compact and powerful 122cc single-cylinder, two-stroke engine produced by Austrian manufacturer Rotax. The Rotax 122 is known for its lightweight design and high power output, making it a popular choice for motorcycles and other light vehicles. It is a liquid-cooled engine with a single overhead camshaft (SOHC) and a reed valve induction system. The Rotax 122 is renowned for its reliability and performance, featuring a robust crankshaft and piston assembly, combined with a durable power valve system. Key features of this engine include a 54mm bore and 54mm stroke, achieving a displacement of 121.9cc, resulting in a high power-to-weight ratio that provides exceptional acceleration and responsiveness. The Rotax 122's compact design allows for versatile placement in various vehicles, making it especially appealing for lightweight motorcycles and ATVs. The Rotax 122 engine has been used in various Aprilia motorcycles, particularly their popular sport bike and scooter models. Notable examples include the Aprilia RS125, a renowned racing-inspired lightweight motorcycle that has been a staple in the 125cc class for several years. The Rotax 122 engine has been praised for its exceptional handling and performance, offering a thrilling and engaging riding experience. The Aprilia SR125, a sporty scooter, also utilizes the Rotax 122 engine, contributing to its agility and maneuverability in urban settings. Due to its popularity and reliable performance, the Rotax 122 has become a benchmark for small-displacement engines, inspiring numerous other manufacturers to implement similar configurations in their offerings. While the Rotax 122 is no longer in current production, its legacy continues to influence the design and development of modern two-stroke engines, highlighting its impact on the motorsport and recreational vehicle industries.