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Call us at 888-284-4588 or 541-928-3390 to see what kind of deal we can put together for you.
   MSRP prices do not include destination charge, pre-delivery set-up, state or local, title, registration, and license fees.
2018 KTM 50 SX  The 50 SX is a true READY TO RACE KTM for young MX riders. 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 allows the rider to concentrate on the track, not shifting. This year's model features revolutionary WP AER 35 front forks, fully adjustable rear suspension, a new exhaust, ultra-cool graphics and detail improvements that make going fast fun.


2018 KTM 50 SX 
  WP AER 35 air-sprung fork is easily adjustable for different rider sizes as well as track conditions.
  Fully adjustable rear suspension to match the performance of the WP AER 35 fork.
  A 3-shaft engine design keeps the crankshaft close to the bike's center of gravity for quick handling along with room for an optimized reed valve angle for maximum performance.
  Bodywork that mimics the full-size 2017 SX-F line that gives the 50 SX a slim profile for excellent ergonomics and handling.
  Front and rear hydraulic brakes by Formula combined with lightweight WAVE discs are powerful with feedback that gives control for any skill level.
  A centrifugal multi-disc automatic clutch provides manageable acceleration and can be adjusted to the track conditions in minutes without tools.
  Super lightweight, black anodized aluminum rims are matched to MAXXIS tires for maximum grip.

Technical Specs

2018 KTM 50 SX 
  Engine Type: Single Cylinder, 2-Stroke
  Displacement: 49 cc
  Bore/Stroke: 39.5/40.0 mm
  Starter: Kickstarter
  Transmission: Rigid 1-Stage Reduction Gear
  Fuel System: Dell'Orto PHBG 19 BS
  Lubrication: Premix 60:1
  Primary Ratio: 33:61 Straight Cut Reduction Gear
  Final Drive: 11:40
  Cooling: Liquid Cooling
  Clutch: Centrifugal Clutch (Adjustable)
  Ignition: Selettra 2p D36
  Frame: Central Tube Frame, Chrome Molybdenum
  Subframe: Steel
  Handlebar: Renthal, Aluminum Ø 22mm
  Front Suspension: WP AER 35 USD Ø 35mm
  Rear Suspension: WP Monoshock
  Suspension Travel Front/Rear: 205 mm / 8.07 in.; 185 mm / 7.28 in.
  Front/Rear Brakes: Disc Brake 160 mm / 160 mm
  Front/Rear Rims: 1.50 x 12"; / 1.60 x 10";
  Front/Rear Tires: 60/100 x 12"; / 2.75 x 10";
  Chain: 1/2 x 3/16 in.
  Silencer: Aluminum
  Steering Head Angle: 24.0"
  Triple Clamp Offset: 22 mm
  Wheelbase: 1,032mm ± 10 mm / 40.6 ± 0.4 in.
  Ground Clearance: 252mm / 9.92 in.
  Seat Height: 684 mm / 26.9 in.
  Tank Capacity, Approx: 2.3L / 0.61 gal.
  Weight (without fuel), Approx: 44.8 kg/ 90 lbs.

Features and Benefits

Engine  The modern, extremely compact 2-stroke engine fitted with an automatic clutch sets the standard in its class with improved power due to a new exhaust pipe. Thanks to the 3-shaft design, the crankshaft is close to the bike's center of gravity. This does not just benefit the handling, but also allows for a flow-optimized intake angle into the reed valve \x96 a prerequisite for maximum performance.
Power Reduction Kit  For absolute beginners the engine power can be reduced to a moderate 5.5hp using a kit from the PowerParts catalog.
Cylinder  The high performance cylinder features a pressure controlled exhaust valve (PCEV) and provides an unrivaled performance within the highly competitive 50 cc class.
Exhaust A newly developed exhaust pipe provides a higher output and a smoother power delivery over the entire rev range, making the new 50 SX even more competitive than before.
Clutch Developed by KTM, the centrifugal multi-disc automatic clutch provides manageable acceleration and makes riding this motorcycle the easiest thing in the world. It can be adjusted to the specific requirements of the track and the rider in minutes and without any special tools.
Bodywork  The bodywork is derived from the full-size SX models and provides perfect ergonomics with well thought-out contact points for the rider and maximum freedom of movement. In addition, smart design solutions for the new front and rear fenders are prime examples of an intelligent design, which guarantees maximum stability through a well thought-out structure and mounting.
Frame  The modern frame produced by WP Performance Systems is made of lightweight, high strength chromoly steel profiles and combines maximum longitudinal stiffness with optimum torsional rigidity. It guarantees easy handling and precise cornering, but also outstanding stability.
Graphics Derived from the full-size SX bikes, the graphic design makes the new 50 SX look even cooler. Its frame has a super rugged polymer coating in black.
Radiator  Like the big KTM bikes, the 50 SX has a liquid cooling system, which even cools the crankcase. Generously sized radiators ensure outstanding heat dissipation for high reliability, even under extremely heavy duty.
Handlebar  Made of high quality aluminum alloy, the handlebar offers top stability and leverage for smaller riders.
Front Suspension  The new 50 SX is the first model in its class fitted with a modern, fully adjustable air fork: the AER 35, made by WP Suspension. Beside a massive weight reduction of 1.6 pounds, the newly developed upside-down front forks with 35mm tube diameter and 205mm of travel ensure outstanding comfort, damping characteristics and directional stability. Another main benefit for junior riders is that the air spring fitted in the left fork leg can be adjusted perfectly and simply to the rider's weight just with an air fork pump.
Rear Suspension  On the rear wheel a WP shock absorber linked directly to the swingarm provides excellent damping performance and is fully adjustable in order set the damping perfectly to rider's preferences and track conditions. The rear wheel travel is 185mm.
Wheels  Like the big KTM factory racers, the 50 SX has super lightweight, black anodized, aluminum rims providing highest strength and safety. The OEM knobbly MAXXIS tires grip superbly on any surface.
Brakes  The KTM 50 SX is fitted with front and rear hydraulic brakes by Formula combined with lightweight Wave brake discs that are easy to control even for the youngest riders. This ensures the best deceleration and the highest standard in the mini class.