The 2005 Polaris XC SP Fusion represents a significant offering in the crossover and performance snowmobile segment, building on Polaris's established heritage in powersports. Engineered for reliability and performance, this model is available with a range of engine options, including 500cc, 600cc, 700cc, 800cc, and 900cc configurations, all featuring Continuously Variable Transmissions (CVT) with integrated primary and secondary clutch systems. The XC SP Fusion line is designed to provide an exceptional riding experience, combining robust construction with the innovative spirit characteristic of Polaris snowmobiles. This comprehensive service and repair manual provides in-depth information for all 2005 Polaris XC SP Fusion snowmobile models. It covers every aspect of the vehicle, from routine scheduled maintenance and fluid specifications to detailed engine assembly, drivetrain component repair, and electrical system diagnostics. With step-by-step instructions, factory-level diagrams, illustrations, and wiring schematics, this manual serves as an essential resource for owners, independent repair shops, and technicians. It empowers users to perform maintenance, troubleshooting, and repairs effectively, ensuring the longevity and optimal performance of their snowmobile.