The KLX250S, produced for the 2009-2010 model years, is a versatile dual-sport motorcycle engineered for both on-road commuting and off-road adventures. Its liquid-cooled, 249 cc four-stroke engine, paired with a 6-speed transmission, provides a balanced performance suitable for a wide range of riding conditions. Known for its robust construction and the reliability characteristic of engineering, the KLX250S offers a capable platform for enthusiasts seeking both utility and recreational riding. Its design emphasizes a blend of practicality for daily use and the durability required for tackling varied terrains, distinguishing it within its segment. This comprehensive service manual provides detailed information for the maintenance, repair, and troubleshooting of the KLX250S models from 2009-2010. It covers all major systems, including engine mechanicals, fuel and ignition systems, transmission, cooling, electrical, suspension, brakes, and chassis components. With step-by-step instructions for routine maintenance, diagnostics, and component overhauls, this manual is an indispensable resource for owners, technicians, and mechanics aiming to ensure the optimal performance and longevity of their vehicle. The manual includes essential technical specifications, torque values, and wiring diagrams, facilitating efficient and accurate service procedures.