The Polaris Sportsman, particularly from the 2001 model year, represents a significant offering in the all-terrain vehicle market. ATVs, with a heritage rooted in snowmobiles, established themselves as a dominant force by introducing innovative features that enhanced comfort and capability. The Sportsman line is renowned for its premium positioning, versatile performance, and robust build quality, often featuring Independent Rear Suspension (IRS) as a key differentiator. These vehicles were engineered to provide capable performance across various terrains, competing with established brands like Yamaha, Honda, and Can-Am. This comprehensive workshop repair service manual provides essential information for the maintenance and repair of the 2001 Polaris Sportsman and its variants, including the Sportsman 400, 500 H.O., 500 DUSE, 500 H.O. DUSE, and 500 H.O. RSE. The manual covers a wide array of systems, from engine mechanicals and fuel systems to suspension, brakes, and electrical components. It details scheduled maintenance, troubleshooting procedures, repair instructions, and technical specifications, offering in-depth guidance suitable for both owners and professional technicians. The content includes high-quality illustrations and diagrams to ensure clarity and accuracy in all service operations.