The Yamaha XT660 is a versatile dual-purpose motorcycle celebrated for its robust engineering and reliability, designed to excel in both on-road and off-road adventures. Produced between 1994 and 2007, this model draws upon a rich heritage in the dual-sport segment, offering a capable platform for riders seeking exploration and everyday utility. Its single-cylinder, four-stroke engine, typically displacing 660cc, provides a strong balance of power and torque, making it well-suited for a variety of riding conditions. The XT660's construction emphasizes durability, with a focus on providing an enjoyable and dependable riding experience, reflecting a commitment to quality craftsmanship. This comprehensive factory service repair manual provides detailed guidance for owners and technicians working on the XT660 models from 1994 to 2007. Covering all aspects of the motorcycle, it includes in-depth procedures for engine systems such as fuel, cooling, and lubrication, as well as chassis components like brakes, suspension, and steering. The manual also details electrical systems, wiring diagrams, and advanced troubleshooting techniques. With step-by-step instructions, detailed illustrations, and factory-level specifications, this manual is an essential resource for performing routine maintenance, complex repairs, and ensuring the optimal performance and longevity of your XT660.