2019 KTM 85 SX Specifications

Name: 2019 KTM 85 SX
Brand: KTM

Cross / motocross • Specs last verified 13 July 2026

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2019 KTM 85 SX Overview

For 2019, KTM offers the 85 SX as a cross / motocross motorcycle with 84.9 cc on tap. The 2019 KTM 85 SX is built around a Single cylinder, two-stroke engine. Internally, bore and stroke are 47 x 49 mm. In everyday use, the 2019 85 SX tips the scales at 68 kg, carries a 5.20-litre fuel tank and offers a seat height of 890 mm. That's roughly 30.6 kg lighter than the average cross / motocross motorcycle in our database. Every technical detail, from suspension travel to tyre sizes, is covered in the full 2019 KTM 85 SX spec sheet below.

2019 85 SX - Pros & Cons

Strengths

Factory engineering: There's nothing exotic about the 2019 KTM 85 SX's spec sheet - just solid, proven engineering for what it's meant to do.

Considerations

Tall seat height: A 890 mm seat puts flat-footing out of reach for a lot of riders - sit on it in person before committing.
Modest fuel capacity: A 5.20-litre tank keeps things light but means budgeting for more frequent fuel stops on any longer ride.
Chain final drive upkeep: A chain drivetrain is the most common setup in its class, but it's also the one that demands the most regular hands-on maintenance.

Wear Points & Servicing Notes

Brake disc and pad wear

Single disc up front provides the primary stopping power; inspect disc thickness and pad wear at each tyre change to catch scoring before it becomes a rotor replacement.

Suspension condition on used examples

Suspension duties are handled by WP upside-down Ø 43 mm up front and WP monoshock at the rear. Weeping fork seals aren't a dealbreaker on a used bike, but they're a fair basis for negotiating price.

Final drive maintenance

Chain final drive on the 85 SX means routine lubing and tension checks are part of ownership - skip them and sprocket wear accelerates noticeably.

Frame & chassis check

The Central-tube frame with double-cradle chassis holds up well with normal use; on a used bike it's still worth checking the head-stock and swingarm pivot area for impact damage or corrosion.

Low-speed handling

The 85 SX's 68 kg kerb weight makes low-speed control noticeably less effort than on a heavier machine.

85 SX - Buying & Maintenance Guide

What to check before buying

A pre-purchase check on the 2019 KTM 85 SX should cover the same ground every time: service history, chain and sprocket condition, and any oil seepage around the casings. Start it from cold if you can - a well-kept 85 SX settles to a smooth idle within seconds.

Oil and filter changes

Oil changes are the cheapest insurance you can buy for a 85 SX's engine - keep to the manufacturer's interval rather than stretching it. Use the viscosity grade the manual specifies, not whatever's on sale.

2019 KTM 85 SX - Frequently Asked Questions

What engine does the 2019 KTM 85 SX have?

The 2019 KTM 85 SX uses a Single cylinder, two-stroke engine with 84.9 cc of displacement.

How much does the 2019 KTM 85 SX weigh?

The 2019 KTM 85 SX weighs 68 kg. This is the manufacturer's dry figure.

What is the fuel tank capacity of the 2019 KTM 85 SX?

The 2019 KTM 85 SX has a 5.20-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 86-104 km between stops.

Is the 2019 KTM 85 SX suitable for shorter riders?

The 2019 KTM 85 SX has a seat height of 890 mm. This is towards the tall end of the spectrum and will require most riders under 175 cm to tiptoe at stops.

What brakes does the 2019 KTM 85 SX have?

The 2019 KTM 85 SX uses Single disc at the front and Single disc at the rear.

What suspension does the 2019 KTM 85 SX have?

The 2019 KTM 85 SX uses WP upside-down Ø 43 mm up front and WP monoshock at the rear.

What frame does the 2019 KTM 85 SX use?

The 2019 KTM 85 SX is built around a Central-tube frame with double-cradle frame.

KTM 85 SX Spec Evolution

The KTM 85 SX was produced across 4 model years (2003-2019). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.

Specification	2003	2004	2006	2019
Dry Weight	72 kg / 158.7 lbs	68 kg / 149.9 lbs	68 kg / 149.9 lbs	68 kg / 149.9 lbs
Engine Type	Single cylinder	Single cylinder	Single cylinder	Single cylinder, two-stroke
Seat Height	-	900 mm / 35.4 in.	750 mm / 29.5 in.	890 mm / 35.0 in.
Fuel Capacity	-	5.00 litres / 1.32 gallons	5.00 litres / 1.32 gallons	5.20 litres / 1.37 US gallons
Displacement (cc)	84.93 cc	84.93 cc	84.90 cc	84.9 cc
Ground Clearance (in.)	-	16.9 inches	16.3 inches	14.3 inches
Ground Clearance (mm)	-	430 mm	415 mm	362 mm
Frame Type	-	Chromium molybdenum central-type frame	Chromium molybdenum	Central-tube frame with double-cradle

Key Specifications

Engine

Single cylinder, two-stroke

Power

Not published by manufacturer

Torque

Not published by manufacturer

Top Speed

Not published by manufacturer

Weight

68 kg / 149.9 lbs

Fuel Capacity

5.20 litres / 1.37 US gallons

Full 2019 KTM 85 SX Specifications

Ground Clearance (in.) 14.3 inches

Ground Clearance (mm) 362 mm

Seat Height 890 mm / 35.0 in.

Dry Weight 68 kg / 149.9 lbs

Fuel Capacity 5.20 litres / 1.37 US gallons

Bore x Stroke (in,) 1.9 x 1.9 inches

Bore x Stroke (mm) 47.0 x 49.0 mm

Displacement (cc) 84.9 cc

Displacement (ci) 5.18 cubic inches

Engine Type Single cylinder, two-stroke

Starter Kick

Clutch Wet

Final Drive Chain (final drive)

Frame Type Central-tube frame with double-cradle

Suspension - Front WP upside-down Ø 43 mm

Suspension - Rear WP monoshock

Brakes - Front Single disc

Brakes - Rear Single disc

Specifications are compiled from manufacturer documentation and cross-referenced technical sources, and corrected on an ongoing basis. Spot an error? Let us know.