ROTAX 850 E-TEC ENGINE: The most powerful 2-stroke engine in the industry.* It pumps out 10 more horsepower (165 hp) than its predecessor, but its responsiveness is what really shines. With the pDrive primary clutch, it’s 30% quicker responding than the 800R E-TEC giving you the instant acceleration you demand. *Observed HP measured on internal dyno test in optimal conditions for 2-stroke engines. REV Gen4 PLATFORM: Key to the Summit’s agility is the extreme mass centralization of the 4th generation REV platform. The trademark pyramidal frame, die-cast aluminum front suspension module and heat exchanger design ensure it’s strong, yet lightweight. PDRIVE CLUTCH: A major factor in the quickness of REV sleds is the pDrive clutch. Fast and friction-free dual rollers transfer torque in place of traditional sliding buttons on this 100% clutch. The oversize rollers with needle bearings, wide flyweights and shaft-on-shaft design emphasize smooth operation and long life. Ultra-responsive shifting, impressive RPM consistency and 2.8 lb./ 1.3 kg lighter than the TRA VII. COOL AIR FLOW: Side panel venting improves airflow to drive components for cooler operations and optimal performance. 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. POWDERMAX LIGHT TRACK WITH FLEXEDGE: 3.5 in. (9 cm) pitch reduces weight, and keeps snow between lugs for added performance. Exclusive 16-in (41-cm) wide design adds flotation and traction without sacrificing manoeuvrability. Edges flex to reduce the effort to initiate roll-up. Available in either 2.5 or 3.0 in (6.3 or 7.63 cm) lug heights.