SMOOTHEST RIDING. MOST VERSATILE. The 800 Switchback PRO-S is for crossover riders who want the ultimate in cornering and handling, and a sled that virtually eliminates stutter bumps. Featuring the Rider-Balanced AXYS Chassis, 800 H.O. Cleanfire Engine, and multiple comfort features, this snowmobile delivers Rider-Balanced Control, Unrivaled Acceleration, and Rider-Centric Comfort.