The YZ125 is a high-performance, liquid-cooled, 125cc two-stroke motocross competition motorcycle renowned for its potent power-to-weight ratio and exceptional handling. Designed for aggressive riding and racing, this model, specifically covering the 2009 and 2010 production years, features advanced KYB Speed Sensitive System front forks and a KYB rear shock for superior damping and adjustability. The long-standing heritage in off-road racing is evident in the YZ125's robust aluminum frame and focus on delivering a thrilling, competitive riding experience.

This comprehensive workshop service repair manual, provided in English, offers in-depth guidance for all YZ125 models from 2009 to 2010. It covers all essential aspects of maintenance and repair, including detailed procedures for engine assembly and disassembly, suspension tuning, braking system servicing, fuel and ignition system diagnostics, and electrical system troubleshooting. The manual is designed to assist owners, mechanics, and technicians in performing scheduled maintenance, component replacement, and complex overhauls, ensuring the YZ125 remains in peak operating condition.