The 2001 Sportsman 400, 500 H.O., and 500 Duse represent a robust line of all-terrain vehicles engineered for demanding recreational and utility use. These models are recognized for their powerful 4-stroke engines, offering versatile performance with options for On-Demand All-Wheel Drive or Selectable 2WD/4WD and Independent Rear Suspension for superior handling. Known for their strong build quality and reliability, these ATVs are equipped to tackle challenging terrains, providing a dependable and capable experience for riders. This comprehensive Service Repair Manual is designed to be an indispensable resource for maintaining and repairing your 2001 Sportsman. It covers a wide array of systems, including detailed engine overhaul and tuning, drivetrain components, electrical systems with wiring diagrams, suspension, and braking systems. The manual also provides essential maintenance schedules, fluid specifications, troubleshooting guides for common issues, and complete rebuild procedures, ensuring that both owners and professional technicians have the necessary information to keep these vehicles in optimal condition.