This manual provides comprehensive service and repair information for the KLX250 D-TRACKER X, covering model years 2009 through 2012. The KLX250 D-TRACKER X is a versatile motorcycle known for its blend of off-road capability and supermoto styling, powered by a four-stroke, single-cylinder engine. The legacy includes a strong lineup of performance-oriented vehicles, and the KLX series exemplifies this with models designed for both agility and reliability. This workshop service repair manual, written in English, details all aspects of the vehicle, from its engine and transmission systems to its chassis, braking, and electrical components, ensuring owners and technicians have the resources needed for optimal performance. The scope of this manual is extensive, offering factory-level detail for maintenance, repair, and troubleshooting. It covers routine service intervals, fluid specifications, and component rebuilds, supported by hundreds of photos, illustrations, and diagrams to clarify procedures. Key sections include in-depth engine work, fuel and cooling systems, transmission and clutch operation, chassis and suspension adjustments, and comprehensive electrical system diagnostics with wiring diagrams. This resource is designed to empower owners and mechanics with the knowledge to perform everything from simple oil changes to complex engine overhauls, ensuring the longevity and proper functioning of the KLX250 D-TRACKER X.