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 new pDrive primary clutch, it’s 30% quicker responding than the 800R E-TEC giving you the instant control you demand. PDRIVE CLUTCH: A major factor in the quickness of REV sleds is the new pDrive clutch. Fast and friction-free dual rollers transfer torque in place of traditional sliding buttons on this advanced 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. REV GEN4 PLATFORM: The 4th generation of the REV platform is designed around aggressive trail riders with a narrow, compact package giving the rider more freedom to move and influence the sled. More centralized masses (especially side-to-side), light weight and industry-leading suspensions make the vehicle ultra responsive. RAS 3 FRONT SUSPENSION: Precise, predictable handling and outstanding bump absorption, even in harsh conditions, with State-of-the-art unequal length A-arm fERGO-STEP SIDE PANELS: Design enables you to slide naturally to three different cornering styles, including a new, extreme-forward position.ront suspension with rack steering. ERGO-STEP SIDE PANELS: Design enables you to slide naturally to three different cornering styles, including a new, extreme-forward position. OPEN TOE-HOLD: Enables rider to naturally pivot their outside foot outward in aggressive cornering. (Alternative toe holds available as accessories) RMOTION 129 REAR SUSPENSION: THE standard for control, capability, comfort and adjustability – with added traction, better braking and more bump filtration in 129 in. (327 cm) version. Separate spring and shock dynamics, plus the most rising-rate / progressive motion ratio in the industry give the rMotion suspension its supple ride in small bumps with added capability in large ones. Easy adjustments for shocks, springs and coupling block.