The Yamaha YZ250, produced in 2005, is a high-performance motocross motorcycle renowned for its potent two-stroke power delivery, agile handling, and robust build quality. This model represents a refinement of a highly successful platform, drawing on Yamaha's extensive motorsport heritage and years of race development. Designed for motocross racers and off-road enthusiasts, the YZ250 is a testament to Yamaha's commitment to engineering excellence and reliability in the competitive off-road segment, offering a thrilling and capable riding experience.

This comprehensive Factory Service Manual (FSM) provides detailed information for the service and repair of the 2005 Yamaha YZ250. It covers essential areas including routine maintenance, troubleshooting, diagnostics, and complete overhaul procedures for all major systems such as the engine, fuel, ignition, cooling, transmission, suspension, brakes, electrical, and chassis. With over 300 pages of technical specifications, diagrams, and step-by-step instructions, this manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain, diagnose, and repair the YZ250 accurately and efficiently.