250 horsepower provides
dominating performance
Kawasaki
stunned the motorcycling world with the launch of its Ninja®
ZX-14 flagship. It didn’t take long for the mighty ZX-14 to
assume its rightful place as the quickest and fastest stock
production motorcycle. Now,
Kawasaki
extends its high-performance domination into the realm of personal
watercraft. As the quickest and most powerful production PWC in
history,
Kawasaki
’s new JET SKI® Ultra® 250X serves notice that “ULTRA”
defines the pinnacle of PWC performance.
The supercharged Ultra 250X delivers 250 horsepower for
astonishing acceleration that can be felt in the rider’s soul.
Once up to speed, its precise handling and superb stability are
equally impressive, thanks to a brand-new hull specifically
designed to capitalize on the engine’s awesome performance.
The JET SKI Ultra 250X’s new engine, jet drive and hull
incorporate racing technology refined through
Kawasaki
’s multiple IJSBA championships. This same technology allows it
to deliver the awesome acceleration of a drag racer, and help
ensure excellent hook-up – even in rough water.
With a 1,498cc marine engine derived from Kawasaki’s astounding
JET SKI STX®-15F watercraft, the Ultra 250X produces power
comparable to a normally aspirated high-performance three-litre
engine, thanks to 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
results in a linear, smooth torque curve which is ideal for a
personal watercraft that needs to accelerate hard all the way from
a standstill through astounding top-end speeds.
A common drawback of forced-induction is the heat build-up that
occurs when the intake air is compressed. The Ultra 250X overcomes
this with the use of a large-capacity intercooler. The 250X’s
supercharger compresses the air to a maximum boost pressure of
11.4psi. This compression heats the intake charge to
extremely-high temperatures, which could limit the engine’s
power output. However, the 250X’s large-capacity intercooler
cools the intake charge back down to ambient temperature or even
less – ideal for producing maximum power.
The JET SKI Ultra 250X’s stunning acceleration is augmented by a
huge 155mm jet pump featuring the largest PWC impeller and nozzle
Kawasaki
has ever produced. Developed based on feedback from
Kawasaki
’s race machines, this pump was specially designed to deliver
predictable thrust and good “traction,” even when riding on
rough water. The pump uses eight guide vanes (instead of the six
used on previous models) to regulate the flow of water from the
impeller for efficient and powerful propulsion. This is a
significant factor in the Ultra 250X’s mind-boggling
acceleration. The new pump incorporates a groove from the center
to the rear of the ride plate which makes it easier to hold a
stable heading when riding in a straight line.
To suit the 155mm jet pump a new, larger impeller was designed,
offering improved “bite” in the higher speed ranges. The
sophisticated three-blade design not only delivers high
performance, but also provides smooth and quiet operation.
In addition to more power and acceleration than any other
production watercraft on the planet, the Ultra 250X also boasts an
all-new race-developed hull. Extensive research and
refinement has allowed
Kawasaki
to design a brand-new hull which is just as comfortable in rough
conditions as in calm. Even at high speeds, rough water can do
little to deter the Ultra 250X. This combination of unearthly
power mated to the latest hull technology allows
Kawasaki
’s flagship to literally cleave through waves that would send
lesser machines running for safe harbor.
In addition to its acceleration and top-speed capabilities, the
Ultra 250X also offers precise handling and superb stability,
thanks to a hull that was specifically designed to compliment the
engine’s incredible output. This fiberglass reinforced
plastic (FRP) hull is loaded with DNA from
Kawasaki
’s IJSBA championship winning machines. This includes
carefully designed sponsons and chines for enhanced straight-line
stability and precise cornering, combined with a 22.5° deep-V
hull for a smoother ride in rough water.
In recognition of the tremendous power on tap,
Kawasaki
designed the Ultra 250X’s hull to lean into corners like a
motorcycle. This helps passengers stay centered, and keeps the
rider in control during peak cornering g-forces.
The Ultra 250X features a five-step adjustable handlebar position
that allows either stand-up or sit-down riding for enhanced
comfort and versatility. As
Kawasaki
’s flagship watercraft, the 250X includes thoughtful standard
features like an enormous 53 gallon detachable front storage
compartment and a 20.6 gallon fuel tank (the largest in its
category) 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. As
the most powerful PWC on the planet, this “ultra” new JET SKI
offers performance and excitement that are unmatched by any other
watercraft.
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