The Kymco Mongoose KXR 250 is a sport ATV from the first generation of this model line, produced between 2003 and 2008. This liquid-cooled, 4-stroke, single-cylinder ATV, with a displacement in the 230cc to 250cc range, is powered by a carbureted fuel system and features an automatic CVT transmission with reverse gear. Designed for recreational off-road use, it offers a balance of performance and agility, characteristic of Kymco's contribution to the sport ATV market. Its robust construction and reliable engineering make it a capable machine for enthusiasts. This factory repair workshop manual provides comprehensive guidance for the Kymco Mongoose KXR 250, covering all model years from 2003 to 2008. It details essential maintenance procedures, including routine service and fluid specifications, as well as in-depth troubleshooting and repair instructions for all major systems. The manual encompasses engine overhaul, drivetrain service, braking system maintenance, electrical system diagnostics, and chassis and body work. It also includes critical technical data, torque specifications, and visual aids such as exploded views and diagrams, making it an indispensable resource for both DIY enthusiasts and professional mechanics seeking to maintain and repair their vehicle.