This comprehensive service repair manual covers Yamaha WR426 and WR426F models from 2000 to 2008. It is your one-stop resource for maintenance and repair procedures, ensuring you can keep your motorcycle running smoothly. The manual includes detailed information on a wide range of topics, such as: * **General Information:** Get a foundational understanding of your Yamaha WR426/WR426F motorcycle, including its design and operating principles. * **Periodic Maintenance:** Follow the recommended maintenance schedule to keep your motorcycle in top condition, preventing potential problems and extending its lifespan. * **Engine:** Find detailed instructions for servicing and repairing the engine, covering components like the cylinder head, pistons, valves, camshafts, and more. * **Fuel System:** Learn about the fuel system's workings and troubleshoot issues related to fuel delivery, carburetors, and fuel injectors. * **Cooling System:** Understand the cooling system's operation and perform necessary maintenance and repairs. * **Electrical System:** Diagnose and repair electrical issues related to the starting system, lighting system, and various electronic components. * **Chassis:** Get guidance on maintaining and repairing the chassis, including components like the frame, suspension, wheels, brakes, and steering. * **Services Information:** Obtain detailed information about recommended service intervals and required maintenance tasks. * **Emission Control Information:** Learn about the emission control systems on your motorcycle and how to maintain them for optimal performance and environmental compliance. This manual is an invaluable resource for both experienced mechanics and DIY enthusiasts, providing the necessary instructions and diagrams to tackle a wide range of repair and maintenance tasks. You can confidently address issues, perform routine maintenance, and keep your Yamaha WR426/WR426F in optimal condition.

The Yamaha WR426 and WR426F, produced from 2000 to 2008, represent a significant chapter in the history of Yamaha's off-road motorcycles. These models were designed for serious off-road enthusiasts, boasting a powerful and reliable 426cc single-cylinder four-stroke engine. The WR426 was renowned for its impressive power delivery, making it a formidable competitor in motocross and enduro events. The WR426F, on the other hand, was specifically tailored for enduro riding, featuring a more manageable powerband and suspension tuned for long-distance riding. Both models were equipped with a six-speed transmission, a durable steel frame, and long-travel suspension components designed to handle the demands of rough terrain. The WR426 and WR426F were highly regarded for their performance and reliability. The 426cc engine provided impressive torque and horsepower, making it a capable performer in both high-speed and technical terrain. The suspension provided a comfortable and controlled ride, absorbing bumps and dips with ease. The WR426F, in particular, was praised for its exceptional handling and ability to navigate tight trails. These motorcycles were known for their durability and ability to withstand the rigors of off-road riding, making them a popular choice among experienced riders. However, these models were not without their drawbacks. The WR426's aggressive power delivery could be challenging for less experienced riders, while its weight could make it cumbersome in some situations. Despite these shortcomings, the WR426 and WR426F solidified Yamaha's position as a leader in the off-road motorcycle market and continue to be sought-after machines by enthusiasts today.