Quite 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 REV Gen4 platform and Rotax 850 E-TEC engine. Feature Highlights Rotax® 850 E-TEC® engine: Next generation of the most advanced direct-injection two-stroke engine technology. Designed for reliability and durability with proven 4-stroke and diesel technologies. Summit Ergo-Step side panels: Rear section of the panels are ergonomically shaped to support the rider’s shins on downhills. Narrow profile and shape at bottom minimizes “paneling out” in sidehilling. Bottom pan is shaped for flotation in carving and sidehilling. pDrive™ clutch: Fast and friction-free dual rollers transfer torque in place of traditional sliding buttons on this 100% new clutch. Ultra-responsive shifting, impressive RPM consistency and lightweight. Profile running boards: Extruded grid-style board allowing snow to pass easily through, preventing washout and trenching, plus clears footrests for grip. Flatter foot position for comfort and control. SHOT starter: Push-button starting with almost no added weight. Uses energy stored in the lightweight ultracapacitor to turn the magneto and with E-TEC® technology, starts the engine.