REV-XM PLATFORM: Summit-specific side panels are powder dynamically designed to glide smoothly through snow in any position, easing roll-up and sidehilling. TMOTION REAR SUSPENSION: The tMotion flexes laterally, reducing the effort to initiate a roll, due to a ball joint at the center hinge between the rear arm and drop link and split flat-tube front arms. Very progressive motion ratio makes the ride on trails even more comfortable. FLEXEDGE TRACKS: By shortening the fiberglass reinforcing rods inside, the track’s edges flex when you carve the sled, making boondocking and sidehilling easier. Provides the flotation of a 16-in. (41 cm) wide track with the agility of a 12-in. (30 cm) track. ROTAX 600 H.O. E-TEC ENGINE: The 600 cc-class benchmark for fuel economy, oil economy, smoothness and ease-of-use. Up to 21 mpg (11.3 L/100 km) trail fuel economy. Virtually no two-stroke smoke and smell and easy starting. Preparing for the off-season is easy with built-in automatic summerization function. No wonder it’s the best-selling 600cc engine in snowmobiling*. 120 horsepower. *Based on retail sale results as of December 31, 2016. RAS 2 FRONT SUSPENSION: Ultimate geometry and lighter components deliver excellent precision and stability – especially in extreme bumps – and reduces roll in corners. Sharp styling, too. PILOT DS 3 SKIS: Designed to work in tandem with the deeper and longer 3 in. track lugs. It has a .47 in (12mm) deeper keel. Holds a sidehill better and offers great control. Narrow ski tip cuts through crusty shallow snow; wide easy-to-install extension widens the tip for added flotation in deeper powder. Pilot DS 2 Skis with Summit SP 146 sleds REV-XM RUNNING BOARDS: Massive, strategically shaped openings keep the boards clear. A tall extruded edge adds stiffness and has aggressive boot grips.