This manual covers the 2005 CR125 and WR125 models, renowned for their 125cc, 2-stroke, liquid-cooled engines and robust construction. Building on a legacy in off-road competition, these motorcycles are designed for performance, with the CR125 tailored for motocross and the WR125 for enduro riding. Key features include a 6-speed transmission, wet multi-plate clutch, and hydraulic disc brakes, all contributing to their capability and reliability in demanding conditions. This service repair manual provides comprehensive information for maintaining and repairing these versatile machines. This comprehensive 374-page English-language Service Repair Manual is designed for DIY enthusiasts and experienced mechanics. It offers detailed guidance on engine disassembly, overhaul, and reassembly, as well as maintenance and repair procedures for the frame, suspensions, wheels, brakes, and electrical system. The manual includes troubleshooting steps for common issues, adjustment procedures for various components like the carburetor and clutch, and complete rebuild instructions. With hundreds of illustrations, diagrams, and essential technical specifications, including torque values and fluid requirements, this manual is an invaluable resource for keeping your CR125 or WR125 in optimal working condition, empowering self-repair and significant cost savings.