This manual covers the KXR50 Mongoose and KXR90 Mongoose All-Terrain Vehicles (ATVs), designed for recreational off-road use. These ATVs are engineered to provide a reliable and enjoyable riding experience for youth riders. Their robust construction and user-friendly operation make them an excellent choice for exploring trails and enjoying outdoor adventures. This comprehensive guide serves as an essential resource for owners and technicians. It details critical maintenance procedures, troubleshooting steps, technical specifications, and important safety guidelines necessary for the upkeep and repair of your ATV. By following the instructions within this manual, you can ensure optimal performance and longevity of your vehicle.