Motocross Bikes

2025KTM 85 SX 19-16

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The 2025 KTM 85 SX 19-16 is a lightweight motocross bike engineered for young and amateur riders transitioning to competitive racing. Its nimble 84.9cc two-stroke engine delivers sharp power delivery ideal for learning track fundamentals, while the 19-inch front and 16-inch rear wheel combination enhances maneuverability on technical terrain.

Capacity: 84.9 ccm
Engine: Single, two-stroke
Gearbox: 6-speed
Dry weight: 69.0 kg
Seat height: 871 mm
Power: Not on record
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What’s new for the 2025 KTM 85 SX 19-16

vs the 2024

Spec	2024	2025
Fuel capacity	5.20 litres (1.37 US gallons)	5.40 litres (1.43 US gallons)
Front brakes	Single disc. Four-piston calipers.	Single disc
Rear brakes	Single disc. Two-piston calipers.	Single disc

Other years 2005 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail90%

Cornering88%

City riding5%

Daily riding5%

Touring3%

Two-up0%

Track85%

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?

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Your height

Inseam (optional)

Units

At 871mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with tip-toe one foot on the 2025 KTM 85 SX 19-16, with a cramped knee angle of around 75 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at 821-900 mm — Long Legs →

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Full specifications

Engine

Capacity: 84.9 ccm
Engine type: Single, two-stroke
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: 1282 mm
Seat height: 871 mm
Dry weight: 69.0 kg
Fuel capacity: 5.40 litres
Ground clearance: 333 mm

Chassis & suspension

Frame: Central double-cradle-type 25CrMo4 steel. Aluminum-reinforced polyamide subframe.
Front suspension: XACT 43 WP Upside-Down fork, Ø 43 mm
Rear suspension: XACT WP PDS mono shock
Front wheel travel: 278 mm
Rear wheel travel: 289 mm
Rake (fork angle): 24.0°

Brakes & wheels

Front brakes: Single disc
Front brakes diameter: 240 mm
Rear brakes: Single disc
Rear brakes diameter: 210 mm
Front tyre: 70/100-19
Rear tyre: 90/100-16

Other

Color options: Orange/black/grey

Specs last verified against published sources: October 2026.

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	2022	2025	2027
Capacity	85 cc	85 cc	85 cc	85 cc	85 cc	85 cc
Dry weight	68 kg	68 kg	69 kg	68 kg	69 kg	69 kg
Seat height	900 mm	875 mm	890 mm	890 mm	871 mm	871 mm
Fuel capacity	5 L	5 L	5 L	5.2 L	5.4 L	5.4 L