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Kelly's
Kawasaki
817 S. Country Club Drive
Mesa, AZ 85210
480.969.9610 |
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Introduction
Better Shifting, Improved Handling and Extra Reliability
You just can't argue with results. Kawasaki's KX250F motorcycle
has been a dominant force in professional supercross and motocross
racing over the last two years. Now, this world-beating machine
gets even better, with a host of refinements offering improved
shifting, quicker handling and boosted reliability.
The KX250F was a model of speed and consistency throughout the
2007 AMA Supercross Lites seasons, sweeping both the AMA West
Region Supercross Lites and East Region Supercross Lites championships
plus the National Arenacross titles. Now, the lessons learned
on the racetrack come home to roost in the 2008 machine.
New crankcases provide increased rigidity in the areas surrounding
the crankshaft, transmission input and transmission output shafts
to transfer torque more-efficiently and improve overall durability
in the toughest race conditions. A new shift lever, positioned
three degrees higher, offers a finer spline pitch so that it
can be adjusted more accurately and provides more-positive shifting.
To compliment the increased longitudinal rigidity introduced
on the 2007 KX250F's frame, the 2008 model features new engine
mounts which use a 10mm longer spacer to reduce torsional rigidity.
This new chassis rigidity balance provides even quicker steering,
better rider feel and a boost in rear wheel traction.
Subtle suspension refinements improve suspension feel, turning
response and bottoming resistance. These changes include smaller
air passages at the top of the fork cartridges which provide
an enhanced air "spring" effect for smoother compression
damping, while .5mm thicker fork piston rods provide increased
rigidity and smoother response through the middle of the suspension's
stroke. Updated settings in the rear shock provide a smoother
mid-stroke response to compliment the changes in the front fork
valving, while a slightly higher ride height provides quicker
handling and a more aggressive feel.
The 2008 KX250F will be available in Kawasaki Lime Green, with
factory-look black alumite coated rims standard.
Racers who ride their KX250F at designated events are eligible
to receive support from Team Green, Kawasaki's amateur
racing support program. Each year, Team Green provides regional
support vehicles and highly trained technicians at more than
100 events, offering technical information and assistance to
those who race Kawasaki products. Kawasaki also offers a comprehensive
contingency program for amateur and professional riders who place
well at designated events.
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Features
Engine
- 249cc, liquid-cooled, four-stroke, four-valve, DOHC engine
delivers hard-hitting power from mid- to high-rpm
- Features improvements in rigidity and reliability
- Wide powerband for excellent low-rpm torque and blistering
over-rev
Top End
- Polished intake ports for an extremely-smooth surface that
improves intake flow at every rpm
- Ultra-light thin-stem titanium valves feature thick skirts
and extended guides for maximum durability
- New head gasket offers better sealing
- Special valve seat material helps prevent wear on the titanium
valves
- K-TRIC digital microcomputer controlled ignition system with
coil on plug "stick" ignition to save weight and improve
performance
- Digital ignition tuned to maximize top-end and over-rev, includes
a spark-controlled rev limiter for more precise control of maximum
engine rpm
Bottom End
- New more-rigid crankcase around the crankshaft and on the left
side, near the input and output shafts for increased reliability
and more-efficient torque transfer
- New kickstart ratchet is 3.5mm thicker for better feel and
reliability
- Crankshaft is surface-hardened for maximum rigidity
- Twin oil pumps ensure proper lubrication and oil scavenging
for optimum performance
- Lightweight magnesium clutch, generator and cylinder head covers
Cooling
- High-capacity Denso radiators are designed to offer superior
cooling in a slim profile
Shifting
- New 3mm higher shift lever with precise adjustability for maximum
rider control
Frame
- All-aluminum perimeter frame features composite structure,
utilizing forged, extruded and cast components
- 10mm wider engine mount spacers reduce torsional rigidity for
quicker steering, improved rear wheel traction and better rider
feel
- The slim profile of the frame, two-piece radiator shrouds that
leave the upper frame spars exposed, and careful design of the
remaining bodywork make the KX250F feel light and narrow beneath
the rider
Front Suspension
- Showa twin-chamber fork keeps oil and air in separate chambers
for stable damping performance during long motos
- Fork features .5mm thicker piston rods for smoother mid-stroke
action
- New smaller air passages at the top of the fork cartridge provide
more of an "air spring" effect during compression,
for more consistent damping
Rear Suspension
- Showa shock with revised tuning
- Raised ride height provides quicker turning and improved bottoming
resistance
- Fine rear shock damping adjuster needle allows precise suspension
tuning
- Alloy swingarm uses cast front section, tapered hydroformed
spars and forged chain pullers; the tapered spars are shaped
to match the balance of flex and rigidity required of the aluminum
frame
- Sprocket-style chain roller helps smooth engine braking by
reducing drive lash
Brakes
- Front and rear brakes utilize petal discs, helping to reduce
overall weight
- Petal discs help to clean the brake pads for more efficient
braking performance
Wheels
- New factory-look black alumite coated rims
From the Cockpit
- Renthal aluminum handlebar is ultra-strong and reduces overall
weight
- Short-length grips feature a special pattern to reduce vibration
transmitted from the bars to the rider
- Particular attention was paid to the body work underneath the
seat to improve the rider's grip on the chassis when standing
Styling
- Bodywork, graphics and seat cover have aggressive style inspired
by championship winning factory teams
Options
- Different inertia magneto rotors
- 12-tooth countershaft sprocket
- Top handlebar clamp for an oversized bar
- Aluminum and steel rear sprockets with optional tooth sizes
- Solid petal brake rotors for wet racing conditions
- Optional springs for the front fork and rear shock
- Manual decompression lever and cable
- 20-inch front wheel
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Technical Specifications
Engine: Four-stroke single with
DOHC and four valves
Displacement: 249cc
Bore x stroke: 77.0 x 53.6mm
Cooling: Liquid
Carburetion: Keihin FCR37 and hot start circuit
Compression ratio: 13.5:1
Ignition: Multi-map digital CDI with K-TRIC throttle position
sensor
Transmission: Five-speed with wet multi-disc manual clutch
Final drive: Chain
Frame: Aluminum perimeter
Rake / trail: 27.7 degrees / 4.7 in.
Front suspension / wheel travel: 47mm inverted Showa twin-chamber
telescopic fork with 16-way compression and rebound damping /
12.4 in.
Rear suspension / wheel travel: UNI-TRAK® linkage system
and Showa shock with 13-way low-speed and stepless high-speed
compression damping, 17-way rebound damping and fully adjustable
spring preload / 12.2 in.
Front tire: 80/100-21 51M
Rear tire: 100/90-19 57M
Front brake: Single semi-floating 250mm petal disc with dual
piston caliper
Rear brake: Single 240mm petal disc with single-piston caliper
Overall length: 85.0 in.
Overall width: 32.3 in.
Overall height: 50.0 in.
Wheelbase: 57.8 in.
Ground clearance: 13.2 in.
Seat height: 37.8 in.
Dry weight: 204 lbs.
Fuel capacity: 1.9 gal.
Color: Lime Green
* Price and specifications subject to change
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