2007 model information - hydrotoys

2007 MODEL INFORMATION

Version: 23 Sep 2006

MODELNAME JET SKI Ultra 250XMARKETINGCODE JT1500B

OVERVIEW ------------------------------------------- P.3

KEY FEATURES --------------------------------------- P.6

PERFORMANCE & ACCELERATION FROM ANOTHER DIMENSION -------------------------------------------------- P.6

SEAWORTHY HULL ------------------------------------------------------ P.9

HANDLING & TURNING PERFORMANCE ---------------------------- P.11

FLAGSHIP FEATURES ------------------------------------------------- P.13

ADDITIONAL FEATURES ---------------------------- P.15

COLOUR(S) ------------------------------------------ P.16

SPECIFICATIONS ----------------------------------- P.17

INDEX

2 0 0 7 M Y J E T S K I U l t r a 2 5 0 X M O D E L I N F O R M A T I O N P A G E 2

There’s a new king on the water. The ultra-high performance JET SKI Ultra 250X pumps out an incredible 250 PS* from its massive supercharged and intercooled engine. Key Ultra 250X technologies stem from Kawasaki’s numerous IJSBA racing championships, which ensure its impressive acceleration and excellent hook-up – even when conditions are not calm. Its precise handling and superb stability are equally impressive, thanks to a brand-new hull designed specifically to allow riders to fully explore the engine’s awesome performance. The most powerful production personal watercraft in history**, Kawasaki’s mighty flagship serves notice that “ULTRA” defines the pinnacle of PWC performance and firmly re-establishes Kawasaki’s reputation as the high-performance industry leader. With mind-blowing power, unmistakable presence and superb handling, the Ultra 250X simply leaves everything else in its wake.

JET SKI ULTRA 250X: ULTRA PERFORMANCE FOR THE ULTIMATE RIDE.

(* Engine performance may vary depending on operating conditions.)

(** As of September 2006.)

OVERVIEW


The 1,498 cm3 Ultra 250X marine engine is derived from Kawasaki’s astounding JET SKI STX-15F, and thanks to its Roots-type high-volume supercharger, it kicks out power equivalent to normally aspirated high-performance engine with a much larger displacement. Unlike centrifugal superchargers or turbochargers though, the direct-drive supercharger delivers boost virtually instantly at any engine speed from idle to redline. The resultant torque curve is just what was needed for a personal watercraft designed to accelerate hard from a standstill – and then keep right on going.

The heat build-up that occurs in supercharged engines when the intake air is compressed is completely overcome in the Ultra 250X through the use of a large-capacity intercooler. The Ultra 250X supercharger produces a maximum boost pressure ratio of 0.8 kg/cm2 [11.4 psi], the highest of any PWC. At this pressure, ambient air can be heated to extremely high temperatures, limiting the engine’s power output. But the large-capacity intercooler, which is nearly as large as the engine block, cools the air right back down to ambient temperature or even less – ideal for producing maximum power.

Besides its mammoth power output, the grin-inducing acceleration is due to a huge 155 mm jet pump equipped with the Kawasaki’s largest impeller and jet nozzle, which are designed to provide maximum thrust and superb rough water hook-up.

The new leader in ultra-high performance engineering

OVERVIEW


From horsepower to handling and everything in between, when the spray settles after your first ride on the Ultra 250X, one thing will be certain. Designed to be the most powerful PWC on the planet, this “ultra” new JET SKI offers new levels of performance and excitement. But what else did you expect from Kawasaki?

Hull technology on the Ultra 250X is equally impressive. Specifically designed to handle the enormous output from the supercharged engine, this race-developed hull handles with precision and stability with a high level of seaworthiness – and at speeds from idle to its rather astounding top end. For starters, the fibreglass reinforced plastic (FRP) hull is loaded with DNA from Kawasaki’s championship winning machines. This includes carefully designed sponsons and chines for straight-line stability and exact cornering, and a deep 22.5° bottom angle for a smooth ride even in rough conditions. In recognition of the tremendous power on tap, we designed the Ultra 250X hull to lean into corners – motorcycle style – to help the passengers stay centred and the rider in control at peak cornering g forces.

Race-derived hull matches the powerful new engine

True to its racing roots, the Ultra 250X includes a 5-step adjustable handle that allows either stand-up or sit-down riding, and, befitting a Kawasaki flagship watercraft, it comes with thoughtful standard features like an enormous 200-litre front storage compartment and a 78-litre fuel tank (one of the largest in the industry) that provides a substantial cruising range.

Flagship features becoming the new PWC king

OVERVIEW


1

2

4

3

5

1

Supercharger and Intercooler-equipped EngineThe Ultra 250X’s liquid-cooled 1,498 cm3, In-line 4-cylinder engine is fitted with a supercharger and intercooler, giving it an output of 250 PS and making it the most powerful production PWC in the world. The roots type supercharger ensures powerful and instant acceleration even from a standing start. (Photo 1, Illustrations A,B)

PERFORMANCE & ACCELERATION FROM ANOTHER DIMENSION

Base 1,498 cm3 In-line Four Marine EngineRoots SuperchargerIntercoolerAir Bypass ValveIntake Manifold

12345

KEY FEATURES


A

B Intake Air Flow

Air Filter

Roots AirCompressor

Intercooler

Regulatory ABVVacuum ABVThrottle Assembly

Intake Manifold

Cylinder Bank

Ultra 250X(Roots Supercharger)Centrifugal SuperchargerSTX-15F

Power

Torque

Engine Performance Comparison

Engine Speed

* The roots type supercharger is known as a fixed displacement supercharger. This design produces large amounts of boost even at low rpm, for instant and powerful acceleration right off of idle. With every revolution it force-feeds the engine 2 litres of air, ensuring a stable supply of high-pressure intake air at all rpm. The result is a very flat and meaty torque curve and step-free power across the rev range, with none of the time lag associated with turbochargers. Theoretical volume is 2,060 cm3/rev, and the maximum boost pressure ratio is 0.8 kg/cm2 [11.4 psi]. This arrangement delivers idealised intake pressure the instant the throttle is opened, for astonishing acceleration.

(Photo 2, Illustration C)

2

4

3* To ensure ideal intake air pressure, not one, but two ABVs (air bypass valves) are used. A vacuum ABV is used to balance air pressure upstream and downstream of the throttle body. It works mostly at low and medium rpm. A second, regulatory ABV aids the vacuum ABV in preventing over-boosting when the throttle is shut (or opened) suddenly. Should the system’s specified maximum pressure be exceeded, the regulatory ABV is activated, allowing air to escape. (Photo 3)

* Efficiently cooling the high-pressure intake air is a liquid-cooled intercooler. Friction between the air molecules heats the intake air to extremely high (power-robbing) temperatures, but the intercooler cools the air back down to ambient temperature. Cooler air results in higher combustion efficiency and high engine output.

(Photo 4)


KEY FEATURES

C

Boo

st

Boost Comparison

Engine Speed

Roots Supercharger

Centrifugal Supercharger

Fuel Injection* New, high-flow fuel injectors with 4 orifices

are fitted to complement the increased power output and to improve combustion efficiency. (Photo 5)

* A single throttle body is used with a bore diameter of 60 mm.

Jet Pump* To efficiently convert the Ultra 250X’s massive 250 PS into thrust, an all-new, large-diameter

155 mm jet pump was designed.

Impeller* To suit the 155 mm jet pump a new, larger impeller was designed, offering improved thrust in

the higher speed ranges. The sophisticated 3-blade unit delivers both high performance and quiet operation.

Guide Vanes* To suit the new jet pump, a new 8-vane guide replaces the earlier 6-vane unit. These guide

vanes smooth and regulate the flow of water from the impeller for efficient and powerful propulsion.

Exhaust* The Ultra 250X features a 4-into-2-into-1 powerboat-style exhaust system, which routes the

exhaust pipe upwards. This allows the smoothest flow for exhaust gases, maximising exhaust efficiency.

5

* The engine’s over-rev range has been raised 700 rpm, to 8,900 rpm.

* Inconel exhaust valves with superior heat resistance are fitted for high reliability. (Valve sizes are: 33.4 mm intake / 28.3 mm exhaust.)

* The 83.0 x 69.2 mm bore and stroke are the same as the JET SKI STX-15F. Compression ratio is lower at 7.8:1.

KEY FEATURES

P A G E 82 0 0 7 M Y J E T S K I U l t r a 2 5 0 X M O D E L I N F O R M A T I O N

Hull* The new hull was designed based on feedback from Kawasaki’s IJSBA championship winning

racing machines. The hull was specially designed to cope with the Ultra 250X’s 250 PS engine output and offers both high stability and responsive handling in both calm and choppy-water conditions.

* To ensure stable handling performance from the larger, more powerful supercharged engine, the new super-strong hull is 250 mm longer.

* The lower hull is specially designed to distribute the engine and power delivery loads over a wide area.

SEAWORTHY HULLConditions on the temperamental sea are varied. Befitting a flagship machine, the ability of Ultra 250X’s race-derived hull to handle waves means that its performance is not compromised when conditions are not calm. The combination of unearthly power coupled with the latest in hull technology allows Kawasaki’s flagship to cleave through waves rather than bounce over them, enabling the most consistent handling and acceleration performance of any Kawasaki hull to date.

KEY FEATURES

P A G E 92 0 0 7 M Y J E T S K I U l t r a 2 5 0 X M O D E L I N F O R M A T I O N

6

Ride Plate* A groove added from the centre to the rear

of the ride plate makes it easier to hold a straight course when running straight ahead. (Photo 6)

Bond Flange & Bumper* The bottom of the hull slants upwards steeply from the centre section to the bow, allowing the

Ultra 250X to penetrate swells and waves with less shock. At low speeds the result is great stability; at higher speeds the Ultra 250X’s massive thrust enables the hull to push through waves rather than bounce over top of them. (Photos 7,8)

Jet Pump* To effectively convert the Ultra 250X’s 250 PS output into thrust, a new jet pump was

designed. The pump features a large 155 mm diameter and uses eight guide vanes in place of the earlier six.

* Designed based on feedback from Kawasaki’s race program, the new pump delivers superior “traction” and stable output in rough water conditions, and is a significant factor in the Ultra 250X’s mind-boggling acceleration.

7 8

KEY FEATURES

2 0 0 7 M Y J E T S K I U l t r a 2 5 0 X M O D E L I N F O R M A T I O N P A G E 1 0

HANDLING & TURNING PERFORMANCE

Hull* Although it has a similar V-shape to the JET SKI STX-15F, the Ultra 250X’s hull enables a high

bank angle, motorcycle-like turning performance. This reduces the side G-loads imposed on riders during turns, allowing them to better concentrate on riding. The V-angle at the bottom of the hull has been changed from the 20° of the 15F to 22.5°. This idealised V-angle helps prevent spinouts during sharp turns. As a result, the Ultra 250X delivers the neutral handling and turning characteristics for which Kawasaki JET SKI are famous.

Stand-up sports riding is easy thanks to adjustable handle and riding position

* The handlebars are 5-way adjustable and suit a wide range of riders and riding styles. The relatively narrow seat is very comfortable for either stand-up or seated riding, as well as for passengers. (Photo 9)

* Ergonomic deck design gives plenty of legroom without necessitating a high seat, for rider-friendly seating accommodations.

9

KEY FEATURES


Sponsons* Newly developed sponsons extend further from the hull to provide stable straight-line

performance (e.g. porpoising from start is minimised, etc) while helping to retain the machine’s narrow overall design. They also contribute significantly to the Ultra 250X’s high manoeuvrability when changing direction (particularly at higher speeds). (Photos 10,11)

Quattro KSD* Ridges across the bottom of the bow,

Kawasaki Splash Deflectors deflect water splashing forward from under the hull. To reduce spray during high-speed turns, the earlier triple splash deflector now has one more deflector mounted at the top. Whether turning or blasting straight ahead, at high speeds or low, the Quattro KSD minimises spray, allowing greater rider concentration. (Photo 12)

12

10 11

KEY FEATURES


13 14

FLAGSHIP FEATURESCapacious Storage

* Mounted on the centre console is a detachable drink holder with space for two drink bottles. (Photo 15)

* Integral with the under-seat rear grip is compact storage area which is ideal for tools and other small items. (Photo 16)

D

15 16

* The large-capacity, fully sealed 200-litre storage area has plenty of room for recreational equipment. A detachable storage compartment is also fitted.

(Photos 13,14, Illustration D)

KEY FEATURES


18

17E

Extended Cruising Range* Offering more fuel capacity than any machine in its class, the Ultra 250X’s 78-litre fuel tank

holds 14 litres more than the JET SKI STX-15F. (Illustration E, Photo 17)

Kawasaki Smart Steering/SLO-Mode* KSS (Kawasaki Smart Steering) is

equipped to help new riders better enjoy the performance of this remarkable machine.

* Smart Learning Operation (SLO)-Mode function allows newer riders to become familiar with the handling and response of this JET SKI watercraft at a more relaxed pace before unleashing the full power of the Ultra 250X. Two separate keys (one for SLO-mode, one for full-power operation) prevent operating mistakes. (Photo 18)

KEY FEATURES


20

21

22 23

19* The reverse lever has been moved from the right side to the left side for easier operation. (Photo 19)

* Small power adjustments are easy with the well-designed throttle lever. Even during extended operation the rider’s finger does not get tired.

* To avoid concentrating heavy components towards the rear, the battery is located inside the front storage area near the centre of the machine. This remote location also frees up space inside the engine bay.

* Mirrors are mounted to the upper deck to facilitate opening of the hatch cover. (Photos 22,23)

* A long rear boarding step makes it easy to climb on board, and the step retracts inside the bumper to prevent damage. (Photo 20)

* The Ultra 250X features a silent cleaning system to purge sea water used to cool the engine. Mounted on the right side cover it is easily accessed when the hatch is opened. Because operation can be done with the seat still fitted, it is virtually noiseless. Fitting a separate connecting tube is quick and easy. (Photo 21)

ADDITIONAL FEATURES


COLOUR(S)


* Valiant Blue / Metallic Phantom Silver

* Sunbeam Red

Type

Displacement

Bore and Stroke

Compression ratio

Valve system

Fuel system

Intake system

Ignition

Starting

Cooling

Lubrication

4-stroke In-Line Four

1,498 cm3

83 x 69.2 mm

7.8:1

DOHC, 16 valves

Fuel injection: ø60 mm x 1

Supercharger and intercooler

Digital

Electric

Inducted water

Forced lubrication, semi-dry sump

DRIVE SYSTEM

Coupling

Type

Thrust

Impeller diameter

Steering

Direct drive from engine

Axial flow, single stage

6,780 N {692 kgf}

6,650 N {678 kgf} (JPN)

ø155

Steerable nozzle

PERFORMANCE

Max. power

Max. torque

184 kW {250 PS} / 7,750 rpm

180 kW {245 PS} / 7,750 rpm (JPN)

237 N.m {24.2 kgf.m} / 6,500 rpm

233 N.m {23.8 kgf.m} / 6,500 rpm (JPN)

Overall length

Overall width

Overall height

Dry weight

Fuel capacity

3,370 mm

1,190 mm

1,150 mm

410 kg

78 litres

ENGINE JT1500B7F

DIMENSIONS

The specifications mentioned here apply to and have been achieved by production models under standard operating conditions. We intend only to give a fair description of the vehicle and its performance capabilities but these specifications may not apply to every machine supplied for sale. Kawasaki Heavy Industries, Ltd. reserves the right to alter specifications without prior notice. Equipment illustrated and specifications may vary to meet individual markets. Available colours may vary by market.

SPECIFICATIONS


2007 model information - hydrotoys

Documents