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A compact, liquid-cooled, four-stroke, single-cylinder engine displacing 249-cubic-centimeters, the KLX250S features convenient electric-starting. The engine is mounted beneath a lightweight, high-tensile steel perimeter frame to deliver a low center of gravity and enhanced maneuvering on tight trails.
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A gear-driven engine balancer means reduced engine vibration for greater comfort and less fatigue on longer rides. The 34-millimeter semi-flat slide Keihin CVK carburetor boosts throttle response and contributes to improved power. It also helps to provide increased fuel economy. The addition of a new evaporative emissions system allows it to meet strict CARB regulations, making the KLX250S eligible for sale in all 50 states.
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Further refinements appear in the transmission. Closer ratios between fifth and sixth gear enhance the KLX250S’ high-speed off-road capabilities, while a reshaped shift cam offers a more positive shift feel and promotes firmer gear engagement.
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The rigors of off-road motorcycling dictate additional protection for the exposed underside of most machines. The KLX250S comes standard with aluminum engine guards to protect its crankcase during off road adventures.
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Negotiating tight terrain also highlights another off-road reality - heat. The incorporation of dual lightweight, high-capacity Denso radiators and a shallow-footprint cooling fan is an ample solution to potential heat issues.
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The rake was increased a degree to 27.5 to boost straight-line stability, which is further enhanced by the rigid square-section frame. Thanks to its short wheelbase, the stability improvements didn’t sacrifice any of the 250S’ outstanding nimbleness or turning aptitude. At the other end of the chassis, a new lightweight aluminum swingarm employs a highly-rigid D-shaped cross section and features new KX racing-type chain adjusters for precise chain adjustment.
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For 2009, the KLX250S received revised damping settings and reduced wheel travel at both ends, plus an all-new rear suspension linkage. These modifications help to increase straight-line stability, give a more planted feel in corners and make it easier for riders to reach the ground. The 43-millimeter inverted cartridge-style front fork and Uni-Trak® rear suspension both come with 16-way adjustable compression damping and offer 10.2 inches and 9.1 inches of travel, respectively.
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New wheels feature 0.5-millimeter thicker spokes for increased wheel rigidity and enhanced off-road durability. The KLX250S also offers upgraded stopping power from a twin-piston caliper and a 250-millimeter semi-floating petal disc up front and a larger 240-millimeter petal disc at the rear.
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Finishing off this reworked package is a completely new set of aggressively styled bodywork, a re-shaped seat with firmer urethane, and a handlebar with a straighter profile.
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Riders seeking enduro handling and modern engine performance in a dual-purpose motorcycle designed for effortless street riding will find it at their local Kawasaki dealership. The KLX250S offers serious capabilities in a fun, easy-to-ride package, regardless of where the adventure takes it.
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Compact engine design is lightweight and high revving, with a broad torque curve
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Good mass centralization for superior handling
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Flat-top piston and pentroof combustion chamber deliver an 11:1 compression ratio
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Lightweight piston, piston pin and connecting rod enable higher revs for maximum power
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Aluminum cylinder features electrofusion coating, which allows a tight piston-cylinder clearance for greater horsepower and offers increased engine life thanks to superior heat transfer and lubrication retention properties
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A gear-driven engine balancer provides smooth power delivery from idle to redline
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Dual high-capacity, vertical-flow Denso radiators provide reliable and efficient engine cooling
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Radiators feature tightly packed cores and a fin design for excellent heat dispersion
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More consistent engine temperatures allow tighter engine clearances for quieter running and sustained power, while promoting longer engine life
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Cooling fan is powered by a shallow-footprint electric motor
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Provides maximum valve area for optimum flow to boost low end torque while providing improved high-rpm breathing efficiency for more power
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34 mm semi-flat slide Keihin CVK carburetor delivers the optimum amount of fuel at all rpm, contributing to improved response and power, as well as good fuel economy
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Now available in California, thanks to new evaporative emissions system that meets strict CARB regulations
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Quick and easy push-button starting
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Kawasaki Automatic Compression Release (KACR) automatically lifts one of the exhaust valves at cranking rpm, for reduced starting effort
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Secondary air system helps provide clean emissions
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USFS-approved spark arrester allows the KLX250S to access designated off-road public riding areas
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Allows engine’s full potential to be used
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Provides excellent acceleration as well as relaxed highway cruising
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Gear ratios amended to set 6th gear closer to 5th for improved performance
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Revised shift cam offers better feeling and allows gears to click into place with more precision
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43 mm inverted cartridge fork offers excellent rigidity and consistent damping performance
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Reduced travel to 10.2 in. for increased straight-line stability, improved handling in corners and a lower seat height
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16-way compression damping adjustment allows tuning for differences in rider weight or various terrain profiles
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All new linkage and revised damping settings reduce front-rear pitching motions
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Rear wheel travel reduced to 9.1 in. for increased straight-line stability, improved handling in corners and a lower seat height
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Progressive linkage rate provides a smooth ride and excellent bottoming resistance
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Shock features 16-way adjustable compression damping
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Lightweight, high-tensile steel for amazing rigidity
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No down tubes for lower engine placement and lower center of gravity
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Still has ample ground clearance
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New lightweight, aluminum D-section swingarm is highly rigid and reduces unsprung weight
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New KX racing-type chain adjusters allow precise adjustment to minimize drivetrain power losses
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Revised handlebar is straighter and offers a more relaxed position and effortless control
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Footpegs are positioned close to the bike’s centerline
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New seat shape and stiffer urethane makes it easier to change seating position
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Aggressive new look courtesy of a new headlight and front fender design
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2-piece radiator shrouds styled like the KX motocrossers
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Rear fender is a 2-piece unit featuring a sharp tail light design that offers increased visibility and further contributes to the KLX’s aggressive styling
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Narrow tank design gives riders maximum comfort and control
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All-digital instrument console gives at-a-glance information that includes a digital bar-graph tachometer, digital speedometer, clock, and dual trip meters
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Front and rear disc brakes offer impressive stopping performance
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Twin-piston caliper grips a 250 mm petal disc up front
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Increased rear brake control provided by a revised lever ratio, new pad material and different caliper
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240 mm rear petal disc is 20 mm larger than the old model
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New 4 mm spokes offer increased wheel rigidity for greater off-road durability
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Tires feature smaller blocks for longer tire life and increased grip on asphalt
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