The 2004 Polaris Pro X represents a significant iteration of Polaris's performance snowmobile line, offering a range of models including the 440 PRO XR, 550 PRO X, 600 PRO X, 600 X2, 700 PRO X, 700 X2, 800 PRO X, 800 X2, and 800 XR. These vehicles are engineered for power and handling, with engine displacements ranging from 440cc to 800cc, utilizing both carbureted and Electronic Fuel Injection (EFI) systems. The Pro X series is built with a focus on reliability and performance, making it a capable choice for various snowmobiling activities. This comprehensive service manual provides factory-level technical data and detailed procedures for the 2004 Polaris Pro X models. It covers general information, specifications, engine systems, fuel systems, electrical systems, drive train, track and brake systems, rear suspension, steering, and body components. The manual includes essential maintenance schedules, break-in procedures, storage preparation, and step-by-step repair instructions, along with extensive troubleshooting guides for common issues. Its detailed diagrams, exploded views, and illustrations are designed to assist owners, DIY enthusiasts, and professional technicians in maintaining and repairing their vehicles effectively.