The 2003 Yamaha SX Viper 700 is a high-performance snowmobile engineered for agile handling and reliable operation, known for its sporty characteristics and powerful 700cc liquid-cooled, 2-stroke triple cylinder engine. This model, including its SX Viper, SX Viper Mountain, and SX Viper ER variants, is built upon Yamaha's legacy of producing durable powersports vehicles, featuring advanced suspension systems for improved ride quality and responsive steering for varied snow conditions. Its design emphasizes a balance of power and control, making it a capable machine for both trail riding and more demanding mountain excursions, distinguishing itself with its robust construction and focus on rider experience. This comprehensive factory service manual provides detailed instructions for the maintenance, service, and repair of the 2003 Yamaha SX Viper 700 and its specific variants. It covers all essential systems, including the engine, fuel system, drive train, track system, chassis, suspension, and electrical components, offering systematic troubleshooting guides and diagnostic procedures. The manual includes step-by-step repair instructions, assembly illustrations, exploded views, and detailed diagrams, along with crucial technical specifications such as torque values, fluid capacities, and electrical data, making it an indispensable resource for owners and technicians seeking to maintain the optimal performance and longevity of their snowmobile.