This comprehensive service repair manual provides a detailed guide for servicing and repairing APRILIA ENGINES 3AS and 4AS models produced between 2004 and 2006. The manual is designed for professional automotive technicians, mechanics, and DIY enthusiasts alike, offering a wealth of information to ensure successful repairs. It covers a wide range of topics including engine, transmission, electrical system, brakes, suspension, and more. Detailed diagrams, step-by-step instructions, and troubleshooting tips are included to guide users through every repair process. The manual also contains specifications, torque values, and wiring diagrams for easy reference. With this manual, you will have access to the same information used by professionals, empowering you to perform high-quality repairs on your APRILIA motorcycle.

## The Aprilia 3AS and 4AS: A Glimpse into Italian Sportbike History

The Aprilia 3AS and 4AS motorcycles, produced between 2004 and 2006, represent a fascinating chapter in the Italian manufacturer's rich history. These sportbikes were designed to appeal to a diverse range of riders, offering a compelling balance of performance and accessibility. The 3AS, powered by a liquid-cooled, 999cc, 90-degree V-twin engine, delivered a potent 110 horsepower, while the 4AS, boasting a larger 1077cc displacement, pushed the output to a thrilling 123 horsepower. Both models were renowned for their smooth power delivery, making them equally enjoyable for spirited rides on winding roads or for carving up track days.

The Aprilia 3AS and 4AS were not just about raw power, though. They employed a sophisticated chassis design, featuring an aluminum twin-spar frame and Showa suspension components, resulting in a nimble and agile handling experience. The bikes were also equipped with high-performance brakes, offering strong stopping power for confident riding. Beyond the mechanical aspects, the 3AS and 4AS boasted distinctive styling, showcasing the signature Italian flair associated with Aprilia. The sleek, sculpted fairings and aggressive lines hinted at the performance capabilities lurking beneath, while the overall design carried a modern and sporty aesthetic. Although production ceased in 2006, the Aprilia 3AS and 4AS remain popular choices for enthusiasts seeking a blend of Italian sportsbike heritage and accessible performance. Their combination of power, handling, and timeless styling continues to attract riders seeking a thrilling yet manageable riding experience.