This manual covers the 1999 Arctic Cat ZRT 800 snowmobile, a performance-oriented model from a manufacturer with a strong heritage in snowmobile engineering. The ZRT line was known for its powerful engines, often featuring triple cylinders, and represented a high-performance segment of Arctic Cat's offerings during a period of significant technological advancement in the late 1990s. The 800cc, 2-stroke engine, typically producing around 110-130 horsepower, combined with a CVT transmission, delivered an exhilarating riding experience. This service manual provides comprehensive information designed to maintain the integrity and performance of this iconic snowmobile. The purpose of this factory service repair manual is to provide detailed technical information for the maintenance, diagnosis, and repair of the 1999 Arctic Cat ZRT 800 snowmobile. It includes comprehensive coverage of engine service, transmission repair, brake system maintenance, electrical system diagnostics, suspension and steering system service, cooling and fuel system procedures, and chassis and bodywork. Furthermore, the manual offers routine maintenance schedules, lubrication guidelines, essential torque specifications, and detailed wiring diagrams. This resource is intended for technicians, mechanics, and dedicated owners seeking to ensure the optimal performance and longevity of their ZRT 800.