This manual covers the snowmobile, specifically models from the First Generation series produced around the 1980s, with applicable years including 1988, 1989, and 1990. This includes the 340, 400, and Long Track Reverse Deluxe variants, identified by model codes such as ET340TRM, ET400TRN, and others. , a renowned manufacturer in the powersports industry, engineered the line for reliability and performance, offering a blend of utility and recreational capability. These snowmobiles are characterized by their two-stroke, fan-cooled engines, available in 339cc and 398cc displacements, and typically feature dual Mikuni carburetors and a CVT transmission with automatic clutch engagement. This comprehensive service and repair manual provides essential information for maintaining and troubleshooting your snowmobile. It details procedures for all major vehicle systems, including the engine, powertrain, chassis, electrical components, cooling system, and fuel system. Coverage extends to routine maintenance, tune-ups, detailed troubleshooting guides, and complete repair instructions with step-by-step guidance, illustrations, and diagrams. The manual also lists special tools required for service and includes important safety information, such as procedures for the Throttle Override System (T.O.R.S.). This digital resource is designed to empower owners and technicians to effectively service their snowmobile, ensuring optimal performance and longevity.