The 2001 Yamaha TT-R90 is an entry-level, youth-oriented off-road motorcycle designed for recreational riding and introducing new riders to motorcycling. Known for its easy-to-use power delivery, automatic clutch, and low seat height, this model embodies Yamaha's reputation for engineering quality and reliability. It competed in a segment alongside similar offerings from other major manufacturers, providing a durable and accessible platform for young enthusiasts to develop their riding skills in off-road environments.

This service repair manual provides comprehensive instructions for the maintenance, diagnosis, and repair of the 2001 Yamaha TT-R90. It covers all essential systems, including the engine, transmission, fuel, ignition, and electrical systems, as well as chassis, suspension, and brakes. The manual details routine maintenance procedures, troubleshooting guides, component overhaul instructions, and critical technical specifications and tolerances, serving as an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of this off-road motorcycle.