This manual covers the 2005 250, 300, 400, 500, and 650 Utility ATVs, including all variations such as automatic and manual transmissions, Fully Independent Suspension (FIS), and ACT rear suspension. There is a strong heritage in powersports, with the 2005 ATV lineup representing a significant stage in development, offering robust utility and performance for a variety of tasks and trail riding. These models, manufactured in Thief River Falls, Minnesota, USA, are known for their durability and were designed to meet diverse consumer needs, with the 650 models featuring a powerful V-Twin engine. This Full Workshop Service Repair Manual provides comprehensive guidance for owners, DIY mechanics, and professional technicians. It details all major systems including the engine, transmission, fuel, lubrication, cooling, electrical, drive, suspension, steering, frame, and controls. The manual includes complete tear-down and rebuild procedures, maintenance schedules, troubleshooting guides, diagnostic information, detailed part diagrams, torque specifications, and adjustments, ensuring that users can effectively maintain and repair their 2005 ATV.