The 2004 Sportsman 400 and 500 are robust All-Terrain Vehicles (ATVs) designed for both recreational trail riding and light work applications. Known for their reliable liquid-cooled engines and user-friendly features such as electric start and On-Demand All-Wheel Drive, these ATVs offer a comfortable and capable riding experience. The Sportsman line emphasizes practical utility combined with the performance needed to navigate varied terrain, making them a popular choice in the mid-size ATV segment. This comprehensive repair manual provides detailed guidance for the maintenance, troubleshooting, and repair of your 2004 Sportsman 400 or 500 ATV. It covers all major systems, including the engine, transmission, drivetrain, suspension, brakes, and electrical components, with step-by-step instructions and clear illustrations. Whether you are performing routine scheduled maintenance, diagnosing a problem, or undertaking a major repair, this manual serves as an essential resource for owners and technicians to ensure the optimal performance and longevity of your vehicle.