The Yamaha TZR125 and DT125R, produced between 1987 and 1993, represent distinct yet popular offerings in the 125cc motorcycle segment. The TZR125, with its race-replica styling and full fairing, delivered sporty performance and handling, while the DT125R offered a more versatile dual-sport experience with its aggressive design and capable off-road suspension. Both models are powered by reliable two-stroke engines, a hallmark of Yamaha's engineering prowess during this era, providing an engaging riding experience for enthusiasts.

This comprehensive service manual provides detailed guidance for the maintenance, repair, and troubleshooting of the Yamaha TZR125 and DT125R models from 1987 to 1993. It covers all essential systems, including engine mechanicals, fuel and ignition systems, transmission, electrical components, suspension, and brakes. With step-by-step procedures, diagnostic charts, and precise technical specifications, this manual is an indispensable resource for owners, technicians, and mechanics aiming to preserve the performance and longevity of these classic Yamaha motorcycles.