The 2002 Yamaha YZ250 is a high-performance 2-stroke motocross motorcycle renowned for its potent power delivery and aggressive handling. Featuring a liquid-cooled, 249cc single-cylinder engine with reed valve induction and Yamaha's Power Valve System, it delivers strong mid-range and top-end power characteristic of its design. The chassis is built around a lightweight aluminum frame, contributing to responsive handling, and is complemented by advanced front and rear suspension systems designed for optimal adjustability and damping performance in demanding off-road conditions. This model represents Yamaha's commitment to competition-grade machinery, building on a long heritage of success in dirt bike racing.

This manual provides comprehensive repair and maintenance information for the 2002 Yamaha YZ250. It covers all essential systems, including detailed procedures for engine overhaul, transmission service, chassis maintenance, braking system upkeep, and electrical system diagnostics. Routine maintenance tasks, troubleshooting guides for common issues, and expert-level instructions for complex repairs such as engine rebuilds and suspension servicing are thoroughly explained. Technical specifications, including precise torque values, clearances, and fluid requirements, are also provided. This resource is designed to assist owners, mechanics, and technicians in maintaining the optimal performance and longevity of their YZ250.