The ultimate Big Boys water toy.

Kawasaki has extended its high-performance on personal watercraft with the 250 horsepower 2008 Jet Ski Ultra 250X. The quickest and most powerful production PWC in history, Kawasaki’s supercharged Ultra 250X tears across the water at a pace that will invigorate even the most jaded of speed enthusiasts.

With a 1,498cc engine derived from Kawasaki’s capable Jet Ski STX-15F watercraft as the foundation, the Ultra 250X produces power comparable to a normally aspirated high-performance three-liter engine. It accomplishes this amazing feat via the addition of a Roots-type supercharger. Unlike centrifugal superchargers or turbochargers, the Ultra 250X’s high-volume direct-drive supercharger delivers boost virtually instantly at any engine speed from idle to redline. This produces a linear, smooth torque curve that is ideal for a personal watercraft that needs to accelerate hard all the way from a standstill to its breath-taking top-end speed.

In addition to more power and acceleration than any other production watercraft on the planet, the Ultra 250X also boasts all new technology, a race-developed hull. Its hull design is just as comfortable in rough conditions as in calm. Even at high speeds, rough water can do little to deter the Ultra 250X.
Heat build-up from compressing the intake air is a common drawback of forced-induction. The Ultra 250X uses of a large-capacity intercooler to overcome this handicap. With the 250X’s supercharger compressing the air to a maximum boost pressure of 11.4psi, the intake charge can reach extremely-high temperatures potentially limiting the engine’s power output. However, the 250X’s large-capacity intercooler brings the pressurized air down to ambient temperature or even less –ideal for producing maximum power.

The Ultra 250X features a five-step adjustable handlebar position that allows either stand-up or sit-down riding for a wide range of riders to enjoy superior comfort and versatility. As Kawasaki’s flagship watercraft, the 250X includes thoughtful standard features like an enormous 53 gallon of storage space including a detachable front storage compartment and a 20.6 gallon fuel tank for substantial cruising range. From horsepower to handling and everything in between, once the spray settles after the first ride, one thing will be certain. This powerful “ultra” 2008 Kawasaki Jet Ski Ultra 250X model delivers a level of performance and excitement that is unmatched by any other watercraft to date.