This manual covers the Mongoose-KXR250, an All-Terrain Vehicle (ATV) from 2003. Engineered with a gasoline engine and a focus on robust performance, the Mongoose-KXR250 is designed for a variety of off-road applications. Its reliable drive train and efficient fuel system, including options for carburetor or fuel injection, ensure dependable operation. This vehicle represents a commitment to quality and durability in the ATV market, offering a capable platform for recreational use and challenging terrains. This comprehensive English-language Factory Shop Manual / Workshop Manual provides essential information for the maintenance and repair of your Mongoose-KXR250. It details scheduled maintenance tasks, coolant replacement, and in-depth repair procedures for the engine, including overhaul and component diagnostics. The manual also covers major systems such as the charging, brakes, suspension, and fuel systems, offering illustrations and diagrams for accurate parts identification and assembly. This resource is invaluable for owners and technicians seeking to maintain the optimal performance and longevity of their vehicle.