More means more - the pure two-stroke power of the quarter-litre engine turns the 250 SX into a precision tool with an unbeatable power-to-weight ratio. With the new linkage rear suspension and completely new frame, it now raises the bar even higher for 250cc machines. It has never been easier to ride onto the podium with a two-stroke in the MX1 class.
TECHNICAL INFO 250 SX 2011
Engine
Engine type Single cylinder, 2-stroke
Displacement 249 cc
Bore/stroke 66.4/72 mm
Compression ratio -
Starter/battery Kickstarter
Transmission 5 gears
Carburetor Keihin PWK 36S AG
Control Exhaust control TVC
Lubrication Mixture oil lubrication 1:40
Gear ratios 14:28 15:24 18:24 21:24 22:21 -
Primary ratio 26:72
Final drive 13:48
Cooling Liquid cooling
Clutch Wet multi-disc clutch, Brembo hydraulics
Ignition Kokusan
Chassis
Frame Central double-cradle-type 25CrMo4
Subframe Aluminium
Handlebar Renthal, Aluminium Ø 28/22 mm
Front suspension WP-USD, Closed Cartridge, Ø 48 mm
Rear suspension WP-Monoshock with linkage
Suspension travel front/rear 300/330 mm
Front/rear brakes Disc brake 260/220 mm
Front/rear rims 1.60 x 21"; 2.15 x 19" Excel
Front/rear tires 80/100-21"; 110/90-19"
Chain 5/8 x 1/4"
Silencer Aluminium
Steering head angle 63.5°
Wheel base 1,495 ± 10 mm
Ground clearance 385 mm
Seat height 992 mm
Tank capacity, approx. 7.5 l
Weight, without fuel, approx. 96.3 kg
