This comprehensive Yamaha WR426F parts manual, Edition 2002, provides detailed information for your motorcycle. It covers various models, including the WR426FP (5NG5), WR426F (5nG6), WR426FP (5NG8), and WR400F (5GSA). The manual includes fully illustrated parts lists with exploded views, making it an invaluable tool for both disassembly and assembly. This detailed visual representation allows for easy identification of each component and its relation within the motorcycle's structure. Whether you're a seasoned mechanic or a DIY enthusiast, this manual will prove an indispensable resource, simplifying the process of understanding and working on your Yamaha WR426F.

The Yamaha WR426F, alongside its close cousins the WR426FP and the earlier WR400F, represented a significant moment in the evolution of off-road motorcycles. Introduced for the 2002 model year, the WR426F was a direct response to the growing popularity of big-bore four-stroke engines in off-road racing. Building upon the success of the WR400F, this new model featured a larger 426cc single-cylinder engine, offering a substantial increase in power and torque. This made the WR426F a formidable competitor in various off-road disciplines, including motocross, enduro, and desert racing. The motorcycle also benefited from a redesigned chassis, featuring a new aluminum frame and updated suspension components, providing a more refined and responsive ride. The WR426F quickly became a favorite among riders for its impressive power delivery, nimble handling, and rugged reliability, establishing itself as a benchmark in the off-road motorcycle market.

The WR426F was not just designed for racing, though. Yamaha equipped it with several features that made it a capable and comfortable off-road companion for recreational riders as well. These included a wide-ratio six-speed transmission for optimal power delivery across various terrain, an electric starter for easy starting in challenging conditions, and a 2.6-gallon fuel tank providing extended riding time. The WR426F also boasted a comfortable and well-appointed cockpit, with a comfortable seat, adjustable handlebars, and clear instrumentation. The WR426FP, a more trail-oriented version, came with a headlight and taillight, making it street legal in some regions. The WR400F, while sharing many components with its successor, featured a slightly smaller engine and a more basic suspension setup. However, it earned a loyal following for its nimble handling and rugged reliability. All models within the WR400/426F family cemented Yamaha's reputation for producing high-quality, capable, and versatile off-road motorcycles, catering to a diverse range of riders and applications.