The 2016 Polaris 800 HO Po RMK is the big mountain news for Polaris. The Polaris engineered 800 HO is the most powerful 800 class engine in the industry beating out the Suzuki engineered M8000 engine and the Rotax engineered ETEC800. The 2016 Polaris 800 HO Pro RMK will have 3 stage electronically controlled exhaust valves, a new lightweight crankshaft - 2.5 pounds lighter, Electronic oil pump and high-flow intake and exhaust. The new engine is more than 10 horse power greater than the 2014 and 2015 Polaris 800 Pro RMK and still a couple more hours power than the 800 ETEC and 800 Suzuki-cat.