The 2009 Sportsman 400 is a versatile All-Terrain Vehicle (ATV) designed for a wide range of users, including recreational riders, hunters, farmers, and utility tasks. Known for its robust chassis and capable Independent Rear Suspension (IRS), this mid-size utility ATV offers a balance of power and manageable size. It features a 376cc, 4-stroke, liquid-cooled engine with a Single Overhead Camshaft and four valves, delivering reliable performance for various terrains and applications. The Sportsman line, a cornerstone of ATV offerings, is recognized for its comfort, handling, and utility, making the 400 model a dependable choice for demanding activities. This comprehensive Factory Service Repair Manual in English provides detailed guidance for the maintenance and repair of your 2009 Sportsman 400 ATV. It covers all essential systems, including the engine, fuel, ignition, cooling, transmission, drivetrain, suspension, steering, braking, and electrical systems. Within its hundreds of pages, you will find routine maintenance procedures, troubleshooting guides, complete disassembly and reassembly instructions, diagnostic charts, and precise torque specifications. This manual is an indispensable resource for owners, mechanics, and technicians aiming to ensure optimal performance, longevity, and safety of the vehicle through accurate service and repair.