2011 KTM 250 SX-F

When you have a bike in your range like the 250 SX-F, which has been the dominant force in the World Championship MX2 class for years, then it would be very easy to just sit back and carry on as before. Luckily, however, that's not how things work in racing, or at KTM for that matter. That's why the new 2011 generation is being launched with a completely reworked chassis, new bodywork and the next stage in engine development with fuel injection.

Engine

Engine Type: Single cylinder, 4-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
Transmission: 6 gears
Carburetor: Keihin EFI, throttle body 42 mm
Control: 4 V/DOHC with finger followers
Lubrication: Pressure lubrication with 2 oil pumps
Engine lubrication Motorex, SAE 10W50
Primary Drive: 22:68
Final Drive: 13:48
Cooling: Liquid cooled
Clutch: Wet multi-disc clutch, operated hydraulically
Ignition: Keihin EMS

Chassis

Frame: Central double-cradle-type 25CrMo4
Subframe: Aluminium
Handlebar: Renthal, Aluminium Ø 28/22 mm (1.10/0.87")
Front Suspension: WP USD Ø 48 mm (1.89")
Rear Suspension: WP-Monoshock with linkage
Suspension travel front/rear: 300/330 mm
Brakes, front/rear: Disc brakes 260/220 mm (10.24/8.66")
Rims, front/rear: 1.60 x 21"; 2.15 x 19" Excel
Tires, front/rear: 80/100-21"; 100/90-19"
Chain: 5/8 x 1/4"
Main silencer: Aluminium
Steering head angle: 63.5°
Wheelbase: 1495±10 mm
Ground clearance (unloaded): 375 mm
Seat height: 992 mm
Tank capacity: approx. 7.5 liters
Weight (no fuel): approx. 99.9 kg