AMS PRICE: £2,399.00
YEAR: 2017

Last few remaining, RRP - £3199, AMS Price - £2399


The 50 SX is a true KTM for young MX riders aged from around 4 to 10 years old and up to a body height of 1.30m. It is a genuine dirt bike that, like its bigger siblings, is produced with top-quality components. This makes the 50 SX the first choice as a stepping stone into the world of MX or for the first racing step on the ladder. With the youngster in mind this package has an engine that delivers steady, controllable power, incorporating an automatic clutch that is ideal for novice riders. This year’s model features revolutionary WP AER 35 front forks, fully adjustable rear suspension, a new exhaust, ultra cool graphics and a lot of detail improvements that make going fast, fun. And safe.


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Technical Details


  • Design: 1-cylinder 2-stroke engine, water-cooled, with reed intake
  • Displacement: 49.0 cm³
  • Bore: 39.5 mm
  • Stroke: 40 mm
  • Starting aid: Kickstarter
  • Transmission: Rigid 1-stage reduction gear
  • Engine lubrication: Mixture oil lubrication
  • Primary ratio: 33:61 straight cut spur gear
  • Final drive: 11:40
  • Cooling system: Liquid cooling system
  • Clutch: Multidisc automatic clutch on the main shaft / centrifugal force
  • Ignition system: SELETTRA 2p D36


  • Frame: Central tube frame of chrome molybdenum steel tubing, powder-coated
  • Fork: WP-USD, AER 35, Ø 35 mm
  • Shock absorber: WP Suspension 3614 BAEM
  • Suspension travel Front: 205 mm
  • Suspension travel Rear: 185 mm
  • Brake system front: Disc brake with four-pot brake caliper
  • Brake system rear: Disc brake with two-pot brake caliper
  • Brake discs - diameter front: 160 mm
  • Brake discs - diameter rear: 160 mm
  • Chain: 1/2 x 3/16”
  • Steering head angle: 66°
  • Wheelbase: 1,032±10 mm
  • Ground clearance (unloaded): 252 mm
  • Seat height (unloaded): 684 mm
  • Total fuel tank capacity approx.: 2.3 l Unleaded premium fuel (95 octane), mixed with 2-stroke engine oil (1:60)
  • Weight without fuel approx.: 41.5 kg