This manual covers the Yamaha DT125R models produced in 1987 and 1988. The DT125R is a capable dual-sport motorcycle renowned for its robust two-stroke engine and versatility, suitable for both on-road commuting and off-road adventures. Yamaha's legacy in producing reliable and performance-oriented motorcycles is evident in this model, which offers a balanced blend of power and durability. This comprehensive guide is designed to assist owners and technicians in maintaining the optimal condition and performance of these classic machines.

This Workshop Service Repair Manual provides in-depth information across a wide range of critical areas, including general vehicle information, detailed specifications, periodic maintenance schedules and adjustments, engine mechanics, cooling and electrical systems, chassis components, carburetor tuning, and essential troubleshooting procedures. It details everything from engine disassembly and reassembly to suspension servicing and electrical component testing. With its comprehensive coverage and detailed technical specifications, this manual serves as an indispensable resource for ensuring the longevity and proper functioning of your Yamaha DT125R.