Welcome to the service and repair manual for the 2010 550 FIS All-Terrain Vehicle (ATV). Known for its extensive experience in powersports, the 550 FIS has been engineered to deliver a balance of power and utility, making it a capable machine for various off-road applications. This model features a liquid-cooled, 4-stroke, SOHC, 4-valve engine with electronic fuel injection, designed for reliable performance. The ATV is equipped with an automatic Continuously Variable Transmission (CVT) offering Hi/Lo range and Reverse, along with selectable 2WD/4WD and front differential lock for enhanced traction. Its robust construction and compliance with ANSI/SVIA standards underscore its commitment to durability and rider safety, making it a dependable choice for recreational and utility purposes. This comprehensive manual serves as an essential resource for maintaining and repairing your 2010 550 FIS ATV. It provides detailed, factory-level information covering all aspects of the vehicle, including engine, transmission, fuel system, lubrication, cooling, electrical, drive, suspension, steering, frame, and controls. You will find step-by-step procedures for periodic maintenance, complete repairs, troubleshooting common issues, and component installation. With hundreds of illustrations and photos, this manual is designed to assist both do-it-yourself enthusiasts and professional technicians in keeping the ATV in optimal condition, ensuring its longevity and performance through clear, accurate guidance.