The Polaris Sportsman, available in 400, 500, 600, and 700cc model variants for the 2004 model year, represents a robust line of all-terrain vehicles designed for a variety of demanding tasks. Known for its strong heritage in powersports and commitment to innovation, the Sportsman has been engineered to deliver reliable performance and utility. These ATVs are built to handle challenging terrain, offering features such as a Variable Transmission with engine braking, and often an all-wheel-drive system, making them suitable for work, recreation, and exploration. The engineering quality ensures durability and a capable ride, reflecting a dedication to producing high-performance powersports equipment. This comprehensive English-language service manual, approximately 130 pages, provides in-depth technical information for the 2004 Sportsman. It covers essential areas including detailed engine diagnosis and overhaul, drivetrain components, chassis systems, and electrical systems, complete with clear illustrations and wiring diagrams. The manual outlines scheduled maintenance procedures, fluid specifications for engine oil, coolant, brake fluid, and gearcase oil, and offers systematic troubleshooting guidance for common issues. This resource is invaluable for owners and technicians alike, enabling accurate maintenance, effective repairs, and confident operation of the vehicle by providing factory-level accuracy and detailed step-by-step instructions.