2017 Kawasaki Jet Ski Ultra 310R, The Jet Ski® Ultra® 310R is the most powerful production personal watercraft in the world, period. The Sport model is equipped with a solid-mount, 18-position handlebar and sport seat – both designed for aggressive sport riding.1,498 cc, inline 4-cylinder marine engine with supercharger and intercoolerAdjustable handlebar clamps provide 3 heights and 2 mount position options (12 total), plus the clamps can be rotated for additional options (16 possible). Accessory clamps provide even more options. Sport performance seat design features a textured “gripper-style” seat cover material to help maintain ride positionFully sealed, class-leading 56 gal. of storage capacity under the hood. Smart Learning Operation (SLO) mode enables new riders to become familiar with the Jet Ski® watercraft.