2016 125 SX Specifications and Highlights

The engine of the 125 SX has been known to be the most powerful and most competitive engine of the class. But it was time to give a new push to the segment and set a clear statement that the two-stroke technology is going to have a successful future due to its outstanding power-to-weight ratio, low cost and simplicity. The newly developed 125cc engine for 2016 features a completely new architecture with the latest KTM engineering know-how and the most advanced technology in the class. The result is that it produces better power all over the rev range while being more compact and 4.4 pounds lighter.

Combine the all-new engine with the new state-of-the-art chassis that is shared with the 4-Stroke SX-F line, and you have a better handling 125 SX that will set a new benchmark in the class.

2016 Highlights

  • NEW lighter Chromoly steel frame provides higher torsional rigidity with less longitudinal stiffness resulting in improved handling and energy absorption
  • NEW smaller, lighter aluminum subframe design
  • NEW lighter swingarm features a revised internal structure to match the new frame characteristics
  • NEW lighter “No Dirt” footpeg design that provides a larger surface area and improved grip
  • NEW CNC machined upper triple clamp featuring a rubber damping system for the NEW Neken handlebar and ODI lock-on grips
  • The advanced WP 4CS (Four Chamber System) Fork features revised damping settings
  • NEW generation WP shock has been developed in conjunction with the new frame and swingarm
  • Super lightweight Galfer Wave rotors, CNC machined hubs, high-end Excel rims and Dunlop GEOMAX MX32 tires
  • NEW airbox and filter design provides maximum performance with fast “no tools” air filter changes
  • The NEW 2016 125 SX weighs only 196.7 lbs / 89.2 kg
  • NEW 125 SX engine is more compact, weighs four pounds less and has more power for class dominance
  • NEW cylinder with revised ports and newly designed power valve unit with a sophisticated mechanism for the lateral exhaust ports gives a massive performance increase over the entire range
  • NEW piston is optimized for maximum reliability with a reworked shape to fit perfectly with the new cylinder layout
  • Lighter crankshaft is optimally balanced for minimum vibrations
  • ALL-NEW die-cast engine cases raise the crankshaft and clutch shaft, centralizing mass and improving handling
  • NEW 6-Speed transmission provides the same gear ratios as before but is lighter and narrower
  • NEW “No Dirt” shift lever prevents dirt from fouling the lever joint to ensure proper shifting in any condition
  • NEW exhaust pipe has been tuned for the 125 SX specifically to get maximum power output from the new engine

125 SX Specifications


  • Engine type Single cylinder, 2-stroke
  • Displacement 124.8 cc
  • Bore/stroke 54/54.5 mm
  • Starter Kickstarter
  • Transmission 5 gears
  • Fuel system Keihin PWK 38S AG Carburetor
  • Control Power Valve
  • Lubrication Premix 40:1
  • Cooling Liquid cooling
  • Clutch Wet multi-disc, Brembo hydraulics
  • Ignition/EMS Kokusan


  • Frame Central double-cradle 25CrMo4 steel
  • Subframe Aluminum
  • Handlebar Neken, Aluminum Ø 28/22 mm
  • Front suspension WP-USD, 4CS, Ø 48 mm
  • Rear suspension WP-Monoshock with linkage
  • Suspension travel – ft./rr. 300/300 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″; 100/90-19″
  • Steering head angle 26.1°
  • Wheel base 1,485 ± 10 mm (58.46±0.39 in)
  • Triple clamp offset 22 mm
  • Ground clearance 370 mm (14.6 in)
  • Seat height 960 mm (37.79 in)
  • Tank capacity, approx. 7 l (1.85 US gal)
  • Weight, approx. 89.2 kg (without fuel) (196.7 lb.)

To purchase this model Click Here

Or Contact

Elite Motorsports




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