This manual covers the 1987 Polaris Indy 400 SKS snowmobile, a performance-oriented trail model known for its sporty handling. As part of Polaris's esteemed Indy lineage, this snowmobile represented a focus on delivering an engaging riding experience during a period of significant technological advancement in the industry. Its design competed effectively within the performance segment of its era, offering a blend of power and agility for riders. This comprehensive factory service repair manual provides essential information for owners and independent repair shops. It details complete overhaul and repair procedures for all major systems, including the engine, fuel, ignition, cooling, drive, suspension, braking, and electrical systems. The manual also includes routine maintenance schedules, detailed troubleshooting guides, and precise technical specifications, enabling effective maintenance and repair of your 1987 Polaris Indy 400 SKS.