This manual covers the Yamaha XT660R and XT660X models from the 2004 production year. These motorcycles are known for their robust single-cylinder engines and versatile chassis, offering a balance of on-road performance and off-road capability for the XT660R, and a more street-focused, supermoto-inspired experience for the XT660X. Built upon Yamaha's heritage of reliable and innovative motorcycle engineering, these models are designed for a wide range of uses, from daily commuting to spirited riding and light trail exploration. Their single-cylinder 660cc engine, electronic fuel injection, and capable suspension systems contribute to their enduring appeal and practicality.

This comprehensive Factory Service Manual provides detailed information for the full service, repair, and workshop needs of your Yamaha XT660R or XT660X. It covers all essential systems, including the engine, fuel, ignition, lubrication, cooling, exhaust, transmission, clutch, drivetrain, chassis, suspension, brakes, and electrical systems, complete with wiring diagrams. Within its pages, you will find step-by-step procedures for routine maintenance, scheduled servicing, troubleshooting, diagnostics, component removal and installation, engine and transmission overhauls, and electrical system repairs. This manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain the optimal performance, reliability, and longevity of their motorcycle.