This manual covers the 2009 Sportsman 300 and Sportsman 400 H.O. All-Terrain Vehicles (ATVs). A renowned manufacturer in the off-road vehicle market, the brand is known for its innovative and durable ATVs. The Sportsman line, a flagship range for the brand, offers comfort, utility, and exceptional all-terrain capability. These mid-displacement models are designed for a variety of uses, providing reliable performance for trail riding and utility tasks. This comprehensive workshop repair service manual in English provides detailed information for maintaining and repairing your 2009 Sportsman ATV. It covers essential areas including engine overhaul and rebuilding, braking system servicing, transmission removal and installation, electrical system diagnostics with wiring diagrams and trouble codes, and suspension and steering procedures. The manual also includes routine maintenance schedules, troubleshooting guides, and step-by-step repair instructions with illustrations, empowering both DIY enthusiasts and professional technicians.