This manual covers the 125 SX, 300 SX, 125 EXC, and 300 EXC models, renowned for their high-performance off-road capabilities. The 'Ready to Race' philosophy is evident in these motorcycles, featuring lightweight yet powerful liquid-cooled two-stroke engines with exceptional power-to-weight ratios. The SX variants are purpose-built for motocross competition, while the EXC models cater to enduro riding with features suitable for varied terrain and longer distances. Both lines benefit from industry-leading WP suspension, a robust steel trellis frame, and sharp, precise handling, making them highly competitive in their respective segments.

This comprehensive guide is designed to assist owners, mechanics, and technicians in maintaining and repairing these off-road motorcycles. It details essential procedures for routine maintenance, such as oil changes, air filter cleaning, and spark plug checks, as well as in-depth repair instructions for engine, transmission, chassis, brakes, and electrical systems. The manual also includes troubleshooting guidance for common issues, technical specifications, fluid recommendations, and information on specialized tools. With a focus on factory-quality information, this manual ensures the longevity and optimal performance of your 125 or 300 SX/EXC.

This manual covers the 125 SX, 300 SX, 125 EXC, and 300 EXC models, renowned for their high-performance off-road capabilities. The 'Ready to Race' philosophy is evident in these motorcycles, featuring lightweight yet powerful liquid-cooled two-stroke engines with exceptional power-to-weight ratios. The SX variants are purpose-built for motocross competition, while the EXC models cater to enduro riding with features suitable for varied terrain and longer distances. Both lines benefit from industry-leading WP suspension, a robust steel trellis frame, and sharp, precise handling, making them highly competitive in their respective segments.

This comprehensive guide is designed to assist owners, mechanics, and technicians in maintaining and repairing these off-road motorcycles. It details essential procedures for routine maintenance, such as oil changes, air filter cleaning, and spark plug checks, as well as in-depth repair instructions for engine, transmission, chassis, brakes, and electrical systems. The manual also includes troubleshooting guidance for common issues, technical specifications, fluid recommendations, and information on specialized tools. With a focus on factory-quality information, this manual ensures the longevity and optimal performance of your 125 or 300 SX/EXC.