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2020 KTM 85 SX 19"/16"

Chaparral Motorsports
April 30, 2019

The riders of the junior class are not beginners. These are future champions fighting for victory, no matter if it is the AMA Amateur National Title or Junior Motocross World Championship. There is no 85 cc machine that is more READY TO RACE than the 2020 KTM 85 SX. This is no surprise really, as it boasts a state-of-the-art engine developed by KTM, combined with a high-end WP suspension and a super lightweight, rugged chassis to make up a perfect overall package.

2020 KTM 85 19"/16" SX Highlights

[caption id="attachment_72732" align="aligncenter" width="300"] 2020 85 SX[/caption]

  • NEW graphics to match the full-sized SX range and give a READY TO RACE appearance.
  • NEW 19"/16" wheel combination for advancing racers.
  • Reworked silencer with improved wool packing reduces weight by 40 g.
  • With an extremely compact engine mated to a precise 6-speed transmission, the KTM 85 SX is an absolute knock-out, delivering first-rate power and torque over the entire rev range.
  • Cylinder is designed around an innovative power valve system that is adjustable and increases torque and controllability.
  • Crankshaft is light while offering precise inertia for peak torque. Optimized balancing reduces vibrations.
  • DS (Diaphragm Spring) clutch is more compact with better performance than a conventional coil spring design.
  • Crankcases are compact with a shaft arrangement that is as close as possible to the center of gravity.
  • The frame is a genuine high-tech product designed for maximum performance and is made of hydro formed chromium molybdenum steel tubes that have been specifically tailored for unrivaled handling and comfort.
  • WP XACT 43 mm front fork with a sophisticated air spring design and separate damping provide easy adjustment to any track condition, rider weight or skill level.
  • WP XACT rear shock with PDS (Progressive Damping System) technology provides excellent bump absorption and stability.
  • Aluminum subframe is light and compact for better mass centralization.
  • Cooling system features integrated crankcase cooling and two radiators for high performance and uses specially designed shrouds to protect the radiator in an impact.
  • Sharp bodywork that is based on the full-sized SX models with the same contact points and overall feel for perfect ergonomics.
  • Airbox similar to the larger SX models allows for air filter changes in seconds without tools.
  • Black coated high-end Excel rims, lightweight, CNC machined hubs and black spokes with lightweight aluminum nipples ensure the highest stability at minimum weight on the KTM 85 SX.


Engine Type: Single Cylinder, 2-Stroke

Displacement: 84.9 cc

Bore / Stroke: 47 / 48.95 mm

Starter: Kickstarter

Transmission: 6 Gears

Fuel System: Keihin PWK 28

Lubrication: Premix 40:1

Primary Ratio: 20:64

Final Drive: 13:46

Cooling: Liquid Cooling

Clutch: Wet Multi-Disc DS Clutch, Formula Hydraulics

Ignition: MEDJ digital

Frame: Central Tube Frame, Chrome Molybdenum

Subframe: Aluminum

Handlebar: Tapered Aluminum Ø 28/22 mm

Front Suspension: WP XACT USD Fork, Ø 43 mm

Rear Suspension: WP XACT, PDS Monoshock

Suspension Travel Front/Rear: 278 mm / 11 in; 305 mm / 12 in

Front/Rear Brakes: Disc Brake 240 mm / 210 mm

Front/Rear Rims: 1.60 x 19" / 1.85 x 16" Excel - Black

Front/Rear Tires: 70/100-19" / 90/100-16" MAXXIS

Chain: 1/2 x 5/16 in

Silencer: Aluminum

Steering Head Angle: 24º

Triple Clamp Offset: 14 mm

Wheelbase: 1,290 mm ± 10 mm / 50.8 in ± 0.4 in

Ground Clearance: 362 mm / 14.2 in

Seat Height: 890 mm / 35 in

Tank Capacity, Approx: 5.2 L / 1.4 gal

Weight (without fuel), Approx: 68 kg / 149.9 lbs

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