The Yamaha YZ125T1, a 2005 model motocross motorcycle, represents a pinnacle of performance and engineering in its class. Known for its liquid-cooled, 2-stroke, single-cylinder engine featuring the Yamaha Power Valve System (YPVS), this machine delivers potent power across the rev range. Its advanced chassis, built around an aluminum semi-double cradle frame, is complemented by high-quality Kayaba SSS front forks and a Kayaba Monocross rear suspension, providing exceptional handling and control on demanding motocross tracks. This model is designed for competitive racing and enthusiasts seeking a responsive and agile riding experience.

This comprehensive English-language Service Repair Manual / Workshop Manual offers in-depth coverage for the Yamaha YZ125T1. It provides detailed procedures for engine disassembly, assembly, tuning, and troubleshooting, alongside extensive information on the fuel, cooling, ignition, transmission, suspension, braking, and electrical systems. The manual includes full electrical wiring diagrams, comprehensive body and chassis information, and specific data such as torque values and fluid capacities. Its manufacturer-written content, numerous illustrations, and clear diagrams make it an invaluable resource for owners and technicians aiming to maintain and repair this high-performance motocross motorcycle.