The Yamaha XT660, a robust dual-sport motorcycle from 2004, is engineered for both adventurous off-road excursions and practical on-road commuting. Featuring a potent 660cc liquid-cooled, single-cylinder engine with electronic fuel injection, it offers a blend of reliable performance and durability. Its design prioritizes off-road capability with a capable suspension system and a sturdy chassis, while also providing a comfortable ride for everyday use. This model represents Yamaha's commitment to versatile, high-quality motorcycles, building on a strong heritage in the dual-sport segment.

This comprehensive factory service manual provides essential technical information for the 2004 Yamaha XT660. It covers all critical aspects of the motorcycle, including detailed procedures for engine overhaul, fuel injection system diagnostics, drivetrain maintenance, and chassis component servicing. You will find in-depth guidance on electrical systems, brake maintenance, and routine service intervals, along with troubleshooting flowcharts and repair instructions. This manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain, diagnose, and repair the Yamaha XT660 to factory specifications.