The Aprilia ROTAX engine type 655 EFI 2001 Workshop Repair Service Manual is your comprehensive guide to maintaining and repairing your engine. This manual, created by the manufacturer themselves, provides detailed information and diagrams for all aspects of your engine. Dive into the intricacies of your engine with clear, step-by-step instructions, ensuring a confident approach to every repair. You will find comprehensive information on engine identification, general safety precautions, a detailed maintenance checklist, and a thorough guide to special tools required for specific tasks. This manual covers a wide range of topics, including engine body, fuel system, cooling system, electrical system, troubleshooting, service specifications, tightening torques, and more. The included wiring diagrams make it easy to diagnose and repair any electrical issues. Gain valuable insights into the complex workings of your Aprilia ROTAX engine, empowering you to perform maintenance and repairs with precision and expertise. With this manual, you can confidently tackle any repair, saving time and money in the process.

The Aprilia Rotax 655 EFI engine, a powerhouse of engineering, was a prominent force in the world of motorcycles in the early 2000s. It was a 655cc, liquid-cooled, four-stroke, single-cylinder engine equipped with electronic fuel injection (EFI) and a fuel-efficient design. This engine was known for its smooth power delivery and responsiveness, making it a popular choice for a variety of applications, including sport bikes, adventure bikes, and even some utility vehicles. The Rotax 655 EFI engine was known for its robust construction, with a cast-iron cylinder liner, a forged crankshaft, and a reliable ignition system. Its design incorporated a sophisticated electronic fuel injection system that optimized fuel delivery for improved performance and efficiency. The engine was famed for its high torque output, which resulted in energetic acceleration, especially at lower and mid-range RPMs, making it particularly well-suited for both on-road and off-road riding. The Aprilia Rotax 655 EFI engine, however, is not without its quirks. Like many single-cylinder engines, it can experience some vibration at higher RPMs, although this was minimized through effective engine balancing and chassis design. Another challenge was the complexity of the EFI system, making repairs and maintenance potentially more involved than traditional carbureted systems. Nevertheless, the Aprilia Rotax 655 EFI engine was a notable engine of its time, offering a compelling blend of power, efficiency, and ruggedness. It was highly regarded by riders for its performance and reliability, leaving a lasting impact on the motorcycle landscape. The engine's legacy continues to be appreciated by enthusiasts who value its unique characteristics and performance potential.