The Polaris Sportsman 400 and 500, produced in 2005, are robust All-Terrain Vehicles (ATVs) designed for both utility and recreational use. Renowned for their proven All-Wheel Drive (AWD) system, comfortable rider ergonomics, and versatility, these models offer reliable performance for various demanding tasks and adventures. As a cornerstone of ATV offerings, the Sportsman line has a strong heritage, emphasizing engineering quality and durability to compete effectively in the utility quad segment. This comprehensive workshop service and repair manual provides in-depth information for the 2005 Polaris Sportsman 400 and 500 models. It covers all essential systems, including engine overhaul, fuel system maintenance, electrical diagnostics, drivetrain and transmission service, suspension and brake repairs, and steering system adjustments. The manual offers detailed, step-by-step instructions for routine maintenance, troubleshooting common issues, and complete repair procedures, making it an indispensable resource for owners and technicians seeking to maintain or restore the vehicle's optimal performance and longevity.