The 2009 Sportsman 300 and Sportsman 400 H.O. represent a robust line of all-terrain vehicles designed for utility and recreational trail riding. A recognized leader in powersports, these models have been engineered with durable construction and reliable performance, making them capable companions for various outdoor tasks and adventures. These ATVs are known for their balanced capabilities, offering a blend of power, comfort, and maneuverability suitable for demanding terrains and extended use. This Full Workshop Service and Repair Manual provides comprehensive guidance for the 2009 Sportsman 300 and Sportsman 400 H.O. It covers essential areas including general information, routine maintenance, engine and fuel system servicing, bodywork, steering, suspension, drivetrain, and electrical systems, complete with detailed wiring diagrams. The manual offers highly detailed, workshop-level procedures for complete tear-downs, rebuilds, repairs, and troubleshooting, empowering owners and technicians to effectively maintain and restore these vehicles to optimal working condition.