Just because the RZR® 900 is 50" wide doesn't mean we skimped on the power. It features the same class leading 75 HP ProStar® 900 engine as the RZR® S 900. Specifically tuned to provide maximum power without compromising drivability for razor sharp trail focused performance with hallmark ProStar® features like dual overhead cams, 4 valves per cylinder and electronic fuel injection.