If you ride, you gotta know.. ski
jet alt="jetski logo"
 
Login | Sign Up   Welcome, Anonymous 10/31/2014 
  InfoZone
  News
  Submit News
  Jet Ski Parts
  Video
  Forum
  Jet Ski Clubs
  Jet Ski Ride Area
  Jet Ski Events
  School
  New Accessories
  Technical
  Banners
  Bikini Shot
  Kawasaki JetSki
  Honda AquaTrax
  Sea Doo
  Yamaha WaveRunner
  Racing
  JetSki Photo Gallery
  Used Sale Guide
  Jet Ski Facts
  Classifieds
  Sport Boat
  Resources
  ATV
  FaceBook


Sponsored by:

Kawasaki JetSki

2008 Kawasaki Jet Ski Ultra 250X
The 250 horsepower pinnacle of PWC performance

Kawasaki extended its high-performance domination into the realm of personal watercraft with the 250 horsepower JET SKI Ultra 250X. The quickest and most powerful production PWC in history, Kawasaki’s supercharged Ultra 250X tears across the water at an electrifying pace that will invigorate even the most jaded of speed enthusiasts. Once up to speed, its precise handling and superb stability are equally impressive, thanks to a hull specifically designed to capitalize on the engine’s awesome performance.

The JET SKI Ultra 250X’s engine, jet drive and hull incorporate racing technology refined through Kawasaki’s multiple IJSBA championships. This knowledge application 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 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.

 

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.


A huge 155mm jet pump featuring the largest PWC impeller and nozzle Kawasaki has ever produced transfers the big power from supercharged 1,498cc engine into the JET SKI Ultra 250X’s blazing acceleration. Developed based on lessons learned from Kawasaki’s race machines, this pump was designed to deliver predictable thrust and good “traction,” even in rough water.


A significant factor in this extra “traction” are the pump’s eight guide vanes that smooth the flow of water from the impeller for efficient and powerful propulsion. The pump also incorporates a groove from the center to the rear of the ride plate which makes it easier to hold a stable heading for straight line riding. Complimenting the 155mm jet pump is an equally large, sophisticated three-blade impeller that delivers high performance with smooth and quiet operation.


In addition to more power and acceleration than any other production watercraft on the planet, the Ultra 250X also boasts 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. This combination of unearthly power mated with the latest hull technology permits Kawasaki’s flagship to literally cleave through waves that would send lesser machines ricocheting to a safe harbor.

 

Thanks to a specifically engineered hull, the Ultra 250X has the precise handling and superb stability to match its acceleration and top-speed capabilities. A fiberglass reinforced plastic (FRP) hull, it is loaded with DNA from Kawasaki’s IJSBA championship winning machines. This includes carefully designed sponsons and chins for enhanced straight-line stability and precise cornering, combined with a 22.5° deep-V hull that leans into corners like a motorcycle. This provides a smoother ride in rough water, helps passengers keep 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 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” JET SKI model delivers a level of performance and excitement that is unmatched by any other watercraft.

MANUFACTURER Kawasaki
MODEL YEAR 2008
MODEL Jet Ski® Ultra® 250X
M.S.R.P. * $11,699.00
ENGINE 4-stroke, 4-cylinder in-line, DOHC, 4-valve per cylinder, supercharged and intercooled, inducted water
DISPLACEMENT 1,498 cc
BORE X STROKE 83 x 69.2 mm
COMPRESSION RATIO 7.8:1
IGNITION TCBI with digital advance
IMPELLER 3-blade, oval-edge stainless steel
PROPULSION SYSTEM 155 mm jet pump, axial-flow, single stage
LUBRICATION Semi-dry sump system
STARTER Electric
HORSEPOWER 250 hp @ 7,750 rpm
THRUST 1,524 lbs.
HEIGHT 45.3 in.
LENGTH 132.7 in.
WIDTH 47 in.
DRY WEIGHT 917 lbs.
SEATING 3
OIL CAPACITY 5.3 qt.
FUEL CAPACITY 20.6 gal.
HULL MATERIAL Fiberglass
HULL TYPE Modified Vee
STORAGE 53 gal.


Comments To This Article:
Overall Rating For This Article: ••••••••••
  • Wow, what a ride! (hmassey, 08/26/2009 , Ratings: ••••• )
    Well so far so good. I just purchased the new Kawasaki Ultra 250X and am a few hours past break in. I went to the Colorado River last weekend and tried some towables. Nothing I put behind this jet ski even attempted to phase its power and acceleration. The speed of this machine is spooky fast. Not sure just how fast it goes, but when my cheeks start winding up back by my ears I'm going fast enough. I've had it in the bays around San Diego a few times, it goes through the rough chop with no problems.

Post Your Comment

Composed: 01/14/2008 | Modified: 01/14/2008
Email to a Friend

Sponsored By:

Features
News
Jet Ski.com - If You Ride You Gotta Know™

THE 2012 BIMINI ROAD PWC RALLY DATES LOCKED FOR JUNE 21-25

Racers returning to Lake Havasu

Jet Ski Ultra 300X/LX, Manufacturing the King of Watercraft

Check Before You Jet Ski

GPS Tracking for your Jet SKI

School
Free on-line Jet Ski boating safety course

New Accessories
Sudco Carburetor Rebuild Kits for Keihin and Mikuni

Technical
So, you want to buy a boat, PWC or Jet Ski....

Know The Rules

Banners
Jet Ski.com logo's and banners

Kawasaki JetSki
2012 KAWASAKI JET SKI ULTRA LX

2011 Kawasaki Ultra 300LX

2011 KAWASAKI JET SKI ULTRA 300X

2011 Jet Ski 800 SX-R

Sea Doo
2012 Sea Doo RXP-X RXT-X GTR

Racing
Dauliach-Pro Ski, Bushell-Pro Runabout, Kazuaki in Pro Freestyle Capture final crowns at 30th quakysense IJSBA World Finals

Americans Dominate Canadian Nationals



------------------------------------------------------------------------------------------------------------
Privacy Statement | Term of Service | Snowmobile | Motorcycle | ATV

ATV Parts | Motorcycle Superstore | Car Insurance Ottawa

All rights reserved © 1997-2014 Copyright JetSki.com
------------------------------------------------------------------------------------------------------------