The Jet Ski Ultra 300X also houses a 1,498cc inline-four DOHC engine and a 54-gallon fuel tank that will give you several turns out on the water before stopping for a refill. Experiment with riding angles thanks to the five-position adjustable handlebars, and blow away the competition with a supercharger that boosts RPMs. Smart Learning Operation mode gives newbies a chance to acquaint themselves with the power at their own pace. Summer will be here before you know it, kids. Add this one to the Santa list.