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2020 KTM 50 SX

Chaparral Motorsports
April 30, 2019

With the KTM 50 SX, young motocross riders who are READY TO RACE can really take off. The fully-fledged bike is ideal for getting into the world of motocross and taking the first steps in racing. Just like its bigger brothers, the KTM 50 SX is equipped with top-quality components. The bike, which is designed from the ground up for young riders, is easy to control and features very steady power delivery. The automatic clutch is ideal for novices on two wheels - it enables budding motocross racers to concentrate on the essentials and very quickly learn basic skills.

[caption id="attachment_72718" align="aligncenter" width="300"] 2020 KTM 50 SX[/caption]

2020 KTM 50 SX Highlights

  • NEW graphics to match the full-sized SX range and give a READY TO RACE appearance.
  • NEW premium cast aluminum swingarm features better flex characteristics for improved stability and offers easier chain adjustment.
  • WP XACT 35 mm air-sprung fork is ultra-lightweight and easily adjustable for different rider sizes and track conditions.
  • Fully adjustable XACT rear suspension with PDS (Progressive Damping System) technology to match the performance of the WP XACT 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 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.


Engine Type: Single Cylinder, 2-Stroke

Displacement: 49 cc

Bore/Stroke: 39.5/40.0 mm

Starter: Kickstarter

Transmission: Single Gear Automatic

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: Aluminum Ø 22 mm

Front Suspension: WP XACT USD Ø 35 mm

Rear Suspension: WP XACT 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: 24.0º

Triple Clamp Offset: 22 mm

Wheelbase: 1,032 mm ± 10 mm / 40.6 ± 0.4 in

Ground Clearance: 252 mm / 9.92 in

Seat Height: 684 mm / 26.9 in

Tank Capacity, Approx: 2.3 L / 0.61 gal

Weight (without fuel), Approx: 41.5 kg/ 91.5 lbs


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