This manual provides comprehensive technical information for the 1999 Xplorer 400, a robust all-terrain vehicle known for its utility and trail performance. Engineered by a manufacturer with a strong heritage in powersports, this model was designed for demanding off-road use. Key features include a 375cc liquid-cooled, single-cylinder, 2-stroke engine, an automatic Variable Transmission (PVT) with high and low range, and hydraulic disc brakes. The Xplorer 400 was built to offer reliability and capability, making it a popular choice for recreational and utility riders of its era. This factory service repair manual serves as an essential resource for maintaining and repairing your 1999 Xplorer 400. It covers a wide array of systems, including detailed procedures for engine overhaul, transmission service, drivetrain, suspension, brakes, and the electrical system. The manual includes step-by-step repair instructions, diagnostic charts for troubleshooting, torque specifications, and comprehensive wiring diagrams. Whether you are performing routine scheduled maintenance, addressing common wear items, or undertaking major component repairs, this manual provides the in-depth guidance necessary for owners and technicians to ensure optimal performance and longevity of the vehicle.