If you have a bike in the
range such as F 250-SX, which has become a dominant force in the MX2 World Championship class for years, it will be very easy to just sit and do as before.Fortunately, however, was not a way of working in racing, or at KTM in this regard. That’s why a new generation was launched in 2011 with a completely re-chassis, new bodywork (see pages 18/19) and the next stage in the development of the engine with fuel injection. With an injection machine designed KTM 250 SX-F is expected to master the world market motorcross 250 cc class, a stable suspension system and braking system comfortable grip make this bike ride in any condition and situation.Competitors ride KTM 250 SX-F in the MX2 world championship does not have to worry about power and performance. Bicycles are the strongest in the field reliably give you an edge in all racing situations. This knife has only one weakness: you have no excuse anymore!
Engine
Engine type single cylinder, four-stroke 
Displacement 248.6 cc
Bore x stroke 76 x 54.8 mm (2.99 x 2.16 “)
Compression ratio 13.2:1
Starter Kickstarter
6 gear transmission
Carburetor Keihin EFI, 42 mm throttle body
Control 4 V / DOHC with finger followers
Lubricant pressure lubrication with 2 oil pumps
Engine lubrication Motorex, SAE 10W50
Primary Drive 22:68
Final drives, 13:48
Cooling liquid cooled
Clutch wet multi-disc clutch, operated hydraulic
Ignition Keihin EMS
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