This manual covers the snowmobile from the 2004 model year, built upon the innovative REV Platform. Engineered for exceptional performance and reliability, these snowmobiles feature advanced 2-TEC engine management systems, available with a range of powerful 2-TEC engines including the 500 SS, 600 HO, 600 HO SDI, and 800 HO. The REV Series incorporates a CVT transmission for smooth power delivery, a hydraulic disc brake system for confident stopping, and a riser block handlebar setup for intuitive control. This guide is designed to assist owners and technicians in understanding and maintaining the various models within the REV Series, including the GSX (E) SPORT, MX Z (E) variants, and SUMMIT models. This comprehensive Service Repair Manual provides detailed maintenance procedures, in-depth troubleshooting guides, and essential technical data to ensure the optimal performance and longevity of your snowmobile. It includes clear, step-by-step instructions for various repair tasks, supported by technical specifications and wiring diagrams. The manual is presented in English and includes numerous illustrations to aid in comprehension, making it an indispensable resource for anyone responsible for the upkeep and repair of these vehicles, ensuring they remain in peak operating condition.