This manual covers the CR125 and WR125 models from the 2008 production year. These motorcycles are designed for motocross and enduro/cross-country racing, respectively, offering robust engineering and reliable performance for enthusiasts and professional riders. The CR125 is a competitive motocross machine, while the WR125 is built for versatile off-road performance, with specific notes included for racing use with a full-power engine configuration. This comprehensive Service Repair Manual provides detailed guidance for the maintenance and repair of your CR125 or WR125. It covers all essential systems, including engine mechanicals, frame and suspension, brakes, electrical systems, and the cooling system, with specific instructions for the exhaust valve system. The manual includes scheduled maintenance procedures, troubleshooting guides, diagnostic steps, and complete rebuild instructions, supported by detailed illustrations and step-by-step instructions, making it an invaluable resource for both do-it-yourself enthusiasts and professional mechanics.