This manual covers the Yamaha XT660R and XT660X motorcycles, produced between 2004 and 2009. The XT660R is a dual-sport model, while the XT660X is a supermoto variant, both featuring a robust 660cc liquid-cooled, four-stroke, single-cylinder engine with electronic fuel injection. Known for their durable build and torquey performance, these motorcycles are designed for versatile riding, from off-road excursions to spirited street use. The XT660R offers capable suspension for varied terrain, while the XT660X is tuned for enhanced road performance with larger front brakes and different suspension characteristics.

This comprehensive service and repair manual provides detailed information for maintaining and repairing your Yamaha XT660R or XT660X. It covers all essential systems, including the engine, fuel system, ignition, electrical components, chassis, suspension, and braking systems. Within its pages, you will find step-by-step procedures for routine maintenance, troubleshooting guides, component removal and installation instructions, engine rebuilding procedures, and technical specifications. This manual is an indispensable resource for owners and technicians alike, ensuring the longevity and optimal performance of your motorcycle.