Just like with the first REV platform that changed snowmobiling forever in 2003, the REV Gen4 puts rider control and mass centralization at the center of the development process. We even developed the 4th generation REV platform with the Rotax 850 E-TEC engine to do so, and today this incredibly popular platform houses both Rotax 2-stroke and 4-stroke engine options. Our goal was to give you the most powerful, responsive, precise and agile sleds. And most importantly, most fun snowmobiles ever.