The 2009 Yamaha YZ250 is a high-performance, liquid-cooled, 2-stroke off-road competition motorcycle renowned for its potent 249cc engine, featuring the Yamaha Power Valve System (YPVS). This model is celebrated for its advanced Kayaba (KYB) SSS front forks and Pro-Lever rear suspension, offering class-leading adjustability and performance on challenging terrain. Its agile aluminum frame and lightweight construction contribute to its reputation as a dominant force in motocross and off-road racing. Designed for dedicated racers and enthusiasts, the YZ250 embodies Yamaha's extensive heritage and continuous refinement in the competitive 250cc class.

This comprehensive Service Repair Manual provides essential information for the maintenance, repair, and troubleshooting of the 2009 Yamaha YZ250. It covers all major systems, including detailed procedures for engine assembly and overhaul, fuel and ignition systems, transmission, clutch, drivetrain, and braking systems. The manual also offers in-depth guidance on suspension servicing, wheel and tire maintenance, steering, and basic electrical system diagnostics. With precise torque specifications, clearances, tolerances, and high-resolution diagrams, this English-language manual is an indispensable resource for owners, mechanics, and technicians aiming to preserve the optimal performance and longevity of their YZ250.