This workshop service repair manual covers the Kodiak 450 (YFM450) models produced between 2003 and 2006. Engineered for reliability and performance, the Kodiak 450 is equipped with a 421 cc 4-stroke, SOHC, 4-valve liquid-cooled engine, featuring a carburetor fuel system and C.D.I. ignition. Its robust build includes independent double wishbone front suspension, a swingarm rear suspension, dual hydraulic disc front brakes, and a sealed drum rear brake, all contributing to its capable performance. The automatic transmission with shaft drive and H, L, N, R, P gear selection ensures versatile operation for various tasks. This comprehensive English-language manual provides essential information for maintaining and repairing your Kodiak 450. It details crucial maintenance procedures, including engine oil and final drive oil specifications, alongside technical data such as engine dimensions, fuel and electrical system specifications, and tire sizes. Mechanics and owners will find detailed guidance on troubleshooting, repair techniques, and component overviews, ensuring the longevity and optimal performance of the vehicle.