2006–2008 Polaris FS/FST Service Manual (P/N 9921066)

• Covers 2006–2008 Polaris FS and FST snowmobile models, including Classic, Touring, Switchback, and IQ variants equipped with the 749cc parallel-twin engine
• Original OEM publication P/N 9921066, documenting the primary production run for these sleds across 337 pages
• Contains 129 model-specific specification tables detailing engine clearances, clutching, suspension tuning, and electrical data
• Includes technical diagrams for EFI systems, cooling circuits, and lubrication flow paths to aid in component identification and routing

Technical Documentation

This Polaris service manual provides detailed data across four major chapters covering general specifications, maintenance, and EFI ignition diagnostics. The text describes component identification and VIN organization for accurate model-year determination. You get complete fastener torque charts and tool usage guidelines for routine service tasks. The maintenance section defines exact interval requirements for the 500-mile break-in period and beyond, detailing lubrication points, track tensioning, and coolant system bleeding. Always observe standard shop safety procedures and use recommended personal protective equipment when referencing high-pressure fuel charts or working around suspended track systems.

System Specifications and Data

The text delivers exact engine parameters for the 749cc powerplant. This includes bore/stroke ratios of 3.45/2.60 inches and tight piston-to-cylinder clearance tolerances of 0.0006–0.002 inches. Cooling system specs mandate a 60/40 mix of propylene glycol. For the Bosch M7.4.4 system, reference values specify a baseline fuel rail pressure of 43–44 PSI, accounting for additional turbo boost on FST models. The manual also documents intake manifold pressure sensor resistance and camshaft phase sensor logic for accurate electrical troubleshooting.