The 2005 Yamaha YZ250 is a highly regarded 2-stroke motocross motorcycle, celebrated for its potent liquid-cooled 249cc engine equipped with the Yamaha Power Valve System (YPVS). This model represents Yamaha's dedication to the competitive open-class motocross segment, offering a powerful platform known for its reliability and performance. Its engineering excellence is further demonstrated through its use of Kayaba suspension components, robust braking systems, and a lightweight aluminum frame, making it a formidable machine designed for demanding off-road use.

This comprehensive service manual provides detailed information for the repair and maintenance of the 2005 Yamaha YZ250 motorcycle. It covers a wide range of systems, including the engine, transmission, fuel, ignition, cooling, exhaust, chassis, suspension, brakes, wheels, and electrical systems. The manual details routine maintenance procedures, engine rebuilds, troubleshooting diagnostics, and specific adjustments for suspension and carburetor tuning. With in-depth technical specifications, torque values, and clear diagrams, this resource is essential for owners, mechanics, and technicians seeking to maintain and repair their YZ250 to factory standards.