The Yamaha TTR90 (TT-R90) is an entry-level youth dirt bike designed for beginner riders and recreational off-road use. Produced around the 2000 model year, this compact motorcycle features an 88cc four-stroke engine with an approachable power delivery and a semi-automatic or automatic clutch, simplifying operation for new riders. Its durable and simple design, coupled with Yamaha's extensive heritage in off-road motorcycling, makes the TTR90 a reliable choice for young enthusiasts and parents seeking a safe, manageable first dirt bike. Notable features include its low seat height and stable handling, contributing to its reputation as an excellent platform for learning.

This comprehensive Service Repair Workshop Manual provides detailed information for the Yamaha TTR90. It covers all aspects of maintenance, repair, and technical specifications necessary for owners, mechanics, and technicians. Key areas include in-depth procedures for engine, fuel, ignition, transmission, suspension, braking, electrical, and chassis systems. The manual also details routine maintenance tasks, troubleshooting common issues, and provides essential data such as torque values, fluid capacities, and wiring diagrams. Its purpose is to ensure the optimal performance, longevity, and safe operation of the TTR90 through accurate and thorough guidance.