The KTM 125, produced for the model years 1999 through 2003, represents a lineage of high-performance off-road motorcycles built upon KTM's extensive racing heritage. These models are characterized by their potent single-cylinder, liquid-cooled two-stroke engines, typically displacing 125cc and featuring robust construction designed for demanding use. With a focus on agility, power delivery, and rider feedback, the KTM 125 series embodies the brand's commitment to producing competitive and durable machines for off-road enthusiasts and professional racers alike.

This comprehensive service manual provides detailed repair and service information for the KTM 125 models from 1999 to 2003. It covers all essential systems, including the engine, cooling, fuel, ignition, transmission, suspension, brakes, and electrical systems, offering step-by-step procedures for maintenance, troubleshooting, and overhaul. The manual is designed to assist professional technicians and experienced DIY enthusiasts in maintaining the optimal performance and longevity of their vehicles, with an emphasis on in-depth technical data crucial for these high-performance machines.