This service manual covers the Aprilia Engine Rotax 123, designed for performance and reliability. It details the engineering and construction of this engine, highlighting its robust design and suitability for demanding applications. The manual is intended to provide comprehensive information for those who service and maintain this specific engine model.

The purpose of this manual is to serve as a definitive guide for technicians and owners. It includes detailed procedures for maintenance, repair, and troubleshooting, along with essential technical specifications and safety guidelines. By following the information provided, users can ensure the optimal performance, longevity, and safe operation of the Aprilia Engine Rotax 123.