Summit® X® 850 E-TEC® Don't let the miles bother you. This machine is as clean as it gets. This sled is a local trade in that is ready to go!!!!!!!!IT'S WHAT'S NEXTQuite simply, the agile, powerful and effortless Ski-Doo Summit X is the beginning of a new era in mountain riding. A mountain sled has never been so responsive and agile, thanks to the combination of new REV platform and Rotax 850 E-TEC engine.