The Polaris FS FST Classic, produced between 2006 and 2008, represents a performance touring and trail snowmobile engineered for enhanced power delivery through its Liberty FST (Freedom Twin Turbo) engine. This 4-stroke, liquid-cooled twin-cylinder model, approximately 750cc, features electronic fuel injection and a turbocharger system, delivering robust horsepower and strong mid-range torque. Its design prioritizes comfort and ergonomics for longer rides, complemented by an Independent Front Suspension (IFS) for improved handling and ride comfort across varied snow conditions. The FS FST Classic embodies Polaris's heritage of innovation, offering a compelling option for riders seeking a blend of speed, capability, and touring comfort. This Service Repair Workshop Manual provides comprehensive guidance for the Polaris FS FST Classic models from 2006 to 2008. It covers essential maintenance procedures, including routine servicing and pre-ride inspections, alongside detailed repair procedures for all major systems. Key areas addressed include engine overhaul, lubrication, cooling, fuel injection, and turbocharger servicing, as well as drivetrain components, electrical systems, braking, chassis, and controls. Technical specifications, troubleshooting charts, and diagnostic procedures are also included, offering valuable resources for owners, mechanics, and technicians to effectively maintain, diagnose, and repair the vehicle, ensuring optimal performance and longevity.