The Grizzly 350 and 400 series, produced from 2003 to 2010, represent a legacy of reliable and capable all-terrain vehicles. These models, identified by chassis codes YFM400FAR and YFM350FAS respectively, are engineered for a wide range of utility and recreational purposes, offering robust performance in various off-road conditions. The Grizzly line is renowned for its durable construction, comfortable ride, and the advanced Ultramatic® transmission with its effective engine braking system, ensuring confidence and control during demanding use. The manufacturer's long-standing reputation in ATV manufacturing is evident in the thoughtful design and engineering of these versatile machines. This comprehensive shop manual provides in-depth service and repair information for the Grizzly 350 and 400 models covering the years 2003 through 2010. It is meticulously designed to guide owners, DIY enthusiasts, and professional technicians through every aspect of vehicle maintenance and repair. The manual details routine maintenance procedures, engine overhauls, fuel and cooling system servicing, transmission and drivetrain work, suspension and steering adjustments, braking system repairs, and electrical system diagnostics. With clear, step-by-step instructions, detailed diagrams, and essential technical specifications, this resource empowers users to maintain their vehicle's peak performance, ensure longevity, and perform complex repairs efficiently, ultimately saving time and costs.