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2012 KTM 150 SX/125 SX

A two-stroke motocross racebike for the Lites class, available with either a 144cc or 124cc engine.

  • CategoryOff-Road / Motocross
  • Displacement144/124cc
  • Dry Weight202 lb.
  • List Price$6399/6299

Rules for AMA motocross racing allow 125cc two-strokes that have been overbored to 144cc to compete in the Lites class. This means Lites two-strokes once again have a fighting chance. KTM is producing just such a 144cc model, called the 150 SX, and if you love small-displacement two-strokes, you won’t want to get off this one. Its power-to-weight ratio is superior to that of any four- or two-stroke machine of its size, and no bike in its class whips through the corners faster and accelerates harder. Also available: The 125 SX is the very same machine with the exception of having a 125cc engine.

Full Specs

  • Specs
  • List price
  • Engine type
  • Bore x stroke
  • Displacement
  • Transmission speeds
  • Front wheel travel
  • Rear wheel travel
  • Fuel capacity
  • Seat height
  • Front brake
  • Rear brake
  • Claimed dry weight
  • Bike Category
  • 2009
  • $6198/5998
  • two-stroke Single
  • 56/54 x 58.5/54.5mm
  • 85/105cc
  • 6
  • 10.8
  • 11.8
  • 2.0 gal.
  • 38.8 in.
  • disc
  • disc
  • 200 lb.
  • Off-Road/Motocross
  • 2012
  • $6399/6299
  • two-stroke Single
  • 56.0/54 x 58.5/54.5mm
  • 144/124cc
  • 6
  • 11.8 in.
  • 13.2 in.
  • 2.0 gal.
  • 39.0 in.
  • disc
  • disc
  • 202 lb.
  • Off-Road/Motocross