The Aprilia Tuono V990 2004 Factory Service Repair Manual is a comprehensive guide for owners and mechanics alike, providing detailed instructions and illustrations for all aspects of maintenance and repair. This service manual, produced directly from the factory, offers a deep understanding of the motorcycle, allowing you to perform repairs with confidence and expertise. The manual covers a wide range of topics, from basic maintenance checks and procedures to complex engine overhauls and electrical system troubleshooting. It includes detailed information on: * **Engine Identification**: Learn to accurately identify your specific engine model. * **General Precautions**: Safety is paramount, and this manual outlines essential safety guidelines to follow during any repair procedure. * **Maintenance Check List**: A comprehensive list of routine maintenance tasks, ensuring your Aprilia Tuono V990 2004 remains in peak condition. * **Check and Maintenance**: Step-by-step instructions for carrying out regular maintenance procedures, ensuring your motorcycle operates smoothly. * **Special Tools**: Detailed information on specialized tools needed for specific repairs, helping you acquire the right tools for the job. * **Engine Body**: Thorough instructions for disassembling, inspecting, and repairing all aspects of the engine, including cylinder heads, pistons, and connecting rods. * **Fuel System**: Comprehensive instructions for troubleshooting and repairing fuel injection systems, fuel lines, and fuel tanks. * **Troubleshooting**: An extensive troubleshooting guide to help you diagnose and resolve any mechanical or electrical issues. * **Servicing Specifications**: Precise specifications for torque values, fluid capacities, and other critical parameters, ensuring accurate repairs. * **Tightening Torques**: Accurate tightening torque values for all nuts and bolts, preventing damage to components. * **Disassembling and Servicing**: Detailed instructions for disassembling and servicing various components, including the transmission, clutch, and brakes. * **Cooling System**: Complete coverage of the cooling system, including radiator, water pump, and thermostat replacement. * **Fuel Filter**: Instructions for replacing the fuel filter, ensuring clean fuel reaches the engine. * **Electrical System**: Comprehensive information on the electrical system, including wiring diagrams, troubleshooting guides, and repair procedures for components like the alternator and regulator. With its wealth of detailed information, clear illustrations, and easy-to-follow instructions, this manual is an invaluable resource for any Aprilia Tuono V990 2004 owner who wants to maintain, repair, or restore their motorcycle to factory specifications.

The Aprilia Tuono V990, launched in 2004, was a radical departure from the traditional naked sportbike formula, aiming to offer the performance and handling of a supersport machine in a more street-focused package. Based on the renowned Aprilia RSV Mille, the Tuono V990 inherited its powerful 998cc, 90-degree V-twin engine, capable of producing over 120 horsepower. However, the Tuono was stripped of the fairings and aerodynamic aids of its supersport sibling, resulting in a more upright riding position and a focus on rider comfort. This combination of power and usability made the Tuono V990 a unique proposition, attracting riders seeking a thrilling experience without sacrificing everyday practicality. The Tuono V990 came equipped with a comprehensive array of features aimed at maximizing performance and control. These included a robust steel trellis frame, Showa upside-down forks, Sachs rear shock absorber, and Brembo radial-mount brakes. The Tuono also featured a distinctive and aggressive design, characterized by its sharp lines and exposed engine. While the Tuono V990 was initially available in standard and "R" trim levels, the “Factory” version, released in 2005, elevated the performance even further. Featuring enhanced suspension components, a lighter exhaust system, and increased horsepower, the Factory model was a true track-focused weapon. With its powerful engine, sharp handling, and unique character, the Aprilia Tuono V990 quickly became a fan favorite, establishing itself as a true icon in the naked sportbike category.