Motocross Bikes
2021KTM 85 SX 19-16
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The 2021 KTM 85 SX 19-16 is a lightweight motocross machine designed for young and developing riders transitioning from smaller bikes. Powered by a 85cc two-stroke engine with liquid cooling and six-speed transmission, it delivers sharp throttle response and agility on the track. Known for its competitive performance in junior motocross racing, the 85 SX combines KTM's championship pedigree with user-friendly handling and accessible power delivery.
- Capacity
- 84.9 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 68.0 kg
- Seat height
- 890 mm
- Power
- Not on record
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What’s new for the 2021 KTM 85 SX 19-16
vs the 2020| Spec | 2020 | 2021 |
|---|---|---|
| Fuel capacity | 5.00 litres (1.32 US gallons) | 5.20 litres (1.37 US gallons) |
| Front suspension | WP upside-down Ø 43 mm | XACT 43 WP Upside-Down fork, Ø 43 mm |
| Rear suspension | WP PDS shock absorber | WP Xplor PDS shock absorber |
Other years
2005
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
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2019
2020
2021
2022
2023
2024
2025
2026
2027
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for motocross racing and track training, with a peaky 2-stroke powerband and race-tuned suspension rather than any road or leisure use.
- Built for
- Sharp, lightweight, and eager to change direction, the 85 SX rewards aggressive throttle control and active riding with explosive acceleration typical of a small-bore 2-stroke.
- Not ideal for
- It is not suitable for adult riders, commuting, passengers, or anyone wanting a comfortable, road-legal, long-distance machine.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 84.9 ccm
- Engine type
- Single, two-stroke
- Bore x stroke
- 47.0 x 49.0 mm
- Compression
- 12.5:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- MEDJ digital EMS
- Lubrication system
- Mixture oil lubrication
- Power
- Not on record - add it
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet, multi-disc clutch, Formula hydraulics
Dimensions & weight
- Wheelbase
- 1290 mm
- Seat height
- 890 mm
- Dry weight
- 68.0 kg
- Fuel capacity
- 5.20 litres
- Ground clearance
- 362 mm
Chassis & suspension
- Frame
- Central-tube frame with double-cradle
- Front suspension
- XACT 43 WP Upside-Down fork, Ø 43 mm
- Rear suspension
- WP Xplor PDS shock absorber
- Front wheel travel
- 278 mm
- Rear wheel travel
- 305 mm
- Rake (fork angle)
- 24.0°
Brakes & wheels
- Front brakes
- Single disc. Four-piston calipers.
- Front brakes diameter
- 240 mm
- Rear brakes
- Single disc. Two-piston calipers.
- Rear brakes diameter
- 210 mm
- Front tyre
- 70/100-19
- Rear tyre
- 90/100-16
Other
- Color options
- Orange/white/black
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2005 | 2011 | 2017 | 2021 | 2022 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 85 cc | 85 cc | 85 cc | 85 cc | 85 cc | 85 cc |
| Dry weight | 68 kg | 68 kg | 69 kg | 68 kg | 68 kg | 69 kg |
| Seat height | 900 mm | 875 mm | 890 mm | 890 mm | 890 mm | 871 mm |
| Fuel capacity | 5 L | 5 L | 5 L | 5.2 L | 5.2 L | 5.4 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the KTM 85 SX 19-16?
The 2021 KTM 85 SX 19-16 has a Capacity of 84.9 ccm (5.18 cubic inches).
How many gears does the KTM 85 SX 19-16 have?
The 2021 KTM 85 SX 19-16 has a Gearbox of 6-speed.
How much does the KTM 85 SX 19-16 weigh?
The 2021 KTM 85 SX 19-16 has a Dry weight of 68.0 kg (149.9 pounds).
Shop this bike
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The 2021 KTM 85 SX 19-16 motorcycle is a powerful and versatile machine that is perfect for young riders looking to take their skills to the next level. With a 19-inch front and 16-inch rear wheel, this bike offers excellent handling and stability, making it ideal for both motocross and off-road riding. The 85cc engine provides plenty of power, and the six-speed transmission allows for smooth and precise shifting. The bike's sturdy construction and high-quality components make it a reliable choice for riders of all skill levels.
In addition to its performance capabilities, the 2021 KTM 85 SX 19-16 also boasts a sleek and stylish design that is sure to turn heads on the track. Its vibrant orange color scheme and aggressive bodywork give it a distinct look that sets it apart from other bikes in its class. With its combination of power, handling, and style, the KTM 85 SX 19-16 is a top choice for young riders who are serious about taking their riding to the next level.
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