FEATURES

• 249cc, liquid-cooled, four-stroke engine delivers hard-hitting power from mid- to high-rpm
• Wide powerband extends smoothly into the over-rev Top End
• Revised intake and exhaust ports, and revised combustion chamber improve low- to mid-range performance
• Rev-limiter settings and ignition timing have been revised to extend the engine's over-rev capability
• New cam profiles help increase high-rpm performance without sacrificing low-end performance
• Piston features a thicker crown to compensate for increased power and higher compression ratio
• Once-piece magneto rotor offers improved reliability
• New stick ignition coil saves weight and offers improved performance Bottom End
• Crankshaft is surface-hardened for additional rigidity
• Countershaft sprocket has more - and smaller - splines to increase reliability
• More efficient oil pumps increase oil flow by nearly 20 percent Cooling
• Newly designed, high-capacity Denso radiators are slimmer
• Radiator features more tightly packed cores and a new fin design to deliver superior cooling efficiency Shifting
• New friction plate material and stiffer clutch springs improve clutch feel
• New clutch lever design compensates for higher spring rate
• Five-speed transmission dogs are beefier to match the engine's increased power
• Shift drum features new cam for improved shifting feel Frame
• All-aluminum perimeter frame features composite structure, utilizing forged, extruded and cast components
• 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
• New UNI-TRAK rear suspension system features revised linkage ratios to suit the new fame and swingarm
• 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, and allow additional clearance for the rear brake caliper when the rear suspension is fully compressed
• Smaller rear chain guide reduces overall weight
• Front and rear brakes utilize new petal discs, helping to reduce overall weight
• Petal discs help to clean the brake pads for more efficient braking performance Wheels
• New rear wheel helps to reduce unsprung weight From the Cockpit - Renthal aluminum handlebar is strong and reduces overall weight
• Short-length grips feature a special pattern to reduce vibration transmitted from the bars to the rider New Styling
• New bodywork and new seat have aggressive style 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