2015 Yamaha Viking EPS - Realtree AP HD, Top FeaturesThe all-new Viking is ready to conquer whatever comes its way with our most powerful 686cc, liquid-cooled, fuel injected, SOHC power plant. This new engine delivers strong low-end acceleration and pulls hard through the rpm range to deliver excellent power delivery for getting the job done or when hitting the trails.The Viking features a large-capacity air intake system that improves overall engine performance. The air cleaner box is accessible from inside the cabin for improved serviceability.Ultramatic® transmission with dual-range (Hi/Lo) drive and reverse is the most advanced drive system available. An automatic centrifugal clutch maintains constant belt tension for reduced belt wear and uses a sprag clutch for all-wheel downhill engine braking in 4WD mode and reverse.