2018 KTM 65 SX Specifications

Name: 2018 KTM 65 SX
Brand: KTM

Cross / motocross • Specs last verified 13 July 2026

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2018 KTM 65 SX Overview

For 2018, KTM offers the 65 SX as a cross / motocross motorcycle with 64.85 cc on tap. The 2018 KTM 65 SX is built around a Single cylinder, two-stroke engine. Internally, bore and stroke are 45 x 40.8 mm. In everyday use, the 2018 65 SX tips the scales at 53 kg, carries a 3.50-litre fuel tank, offers a seat height of 750 mm and spans a 1,137 mm wheelbase. That's roughly 45.6 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 2018 KTM 65 SX spec sheet below.

2018 65 SX - Pros & Cons

Strengths

Accessible seat height: At just 750 mm, flat-footing at a stop is easy for most riders - a genuine confidence builder for less experienced owners.

Considerations

Carburetor fuelling: Carburetion is more hands-on than fuel injection - plan on periodic jetting and cleaning as part of routine ownership.
Modest fuel capacity: A 3.50-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

Carburetor maintenance

Being carbureted, the 65 SX is more sensitive to stale fuel and altitude changes than a fuel-injected bike - a carb clean and rejet restores crisp throttle response after any extended lay-up.

Brake disc and pad wear

Single disc. Four-piston calipers. Wave brake discs. 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 ? 35 mm up front and WP shock absorber 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 65 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 65 SX's 53 kg kerb weight makes low-speed control noticeably less effort than on a heavier machine.

65 SX - Buying & Maintenance Guide

What to check before buying

A pre-purchase check on the 2018 KTM 65 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 65 SX settles to a smooth idle within seconds.

Oil and filter changes

Oil changes are the cheapest insurance you can buy for a 65 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.

Carburetor upkeep

A 65 SX that's sat unused is almost always a carb-cleaning job before it runs right again - float bowls and pilot jets first, since they clog before anything else.

2018 KTM 65 SX - Frequently Asked Questions

What engine does the 2018 KTM 65 SX have?

The 2018 KTM 65 SX uses a Single cylinder, two-stroke engine with 64.85 cc of displacement.

How much does the 2018 KTM 65 SX weigh?

The 2018 KTM 65 SX weighs 53 kg. This is the manufacturer's dry figure.

What is the fuel tank capacity of the 2018 KTM 65 SX?

The 2018 KTM 65 SX has a 3.50-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 58-70 km between stops.

Is the 2018 KTM 65 SX suitable for shorter riders?

The 2018 KTM 65 SX has a seat height of 750 mm. This is a comfortable, accessible height for most riders.

What brakes does the 2018 KTM 65 SX have?

The 2018 KTM 65 SX uses Single disc. Four-piston calipers. Wave brake discs. at the front and Single disc. Two-piston calipers. Wave brake discs. at the rear.

What fuel system does the 2018 KTM 65 SX use?

The 2018 KTM 65 SX uses Carburettor. Mikuni TMX, providing precise fuelling across the rev range and reliable cold-start behaviour.

What suspension does the 2018 KTM 65 SX have?

The 2018 KTM 65 SX uses WP upside-down ? 35 mm up front and WP shock absorber at the rear.

KTM 65 SX Spec Evolution

The KTM 65 SX was produced across 20 model years (2003-2023). 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	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2021	2022	2023
Wet Weight	-	-	-	-	-	-	-	-	-	173.0 kg / 381.4 lbs	-	112.0 kg / 246.9 lbs	-	-	-	-	-	-	-	-
Dry Weight	55.6 kg / 122.6 lbs	55.6 kg / 122.6 lbs	55.6 kg / 122.6 lbs	55.6 kg / 122.6 lbs	55.6 kg / 122.6 lbs	55.6 kg / 122.6 lbs	55.6 kg / 122.6 lbs	55.4 kg / 122.1 lbs	55.4 kg / 122.1 lbs	55.4 kg / 122.1 lbs	55.5 kg / 122.4 lbs	55.5 kg / 122.4 lbs	55.5 kg / 122.4 lbs	53 kg / 116.8 lbs	53 kg / 116.8 lbs	53 kg / 116.8 lbs	53 kg / 116.8 lbs	53 kg / 116.8 lbs	53 kg / 116.8 lbs	53 kg / 116.8 lbs
Engine Detail	-	-	-	-	-	-	-	-	-	Reed intake and exhaust control	Reed intake.	Reed intake.	Reed intake.	Reed intake.	Reed intake.	Reed intake	Reed intake	-	-	-
Engine Type	Single cylinder	Single cylinder	Single cylinder	Single cylinder	Single cylinder	Single cylinder	Single cylinder	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke
Seat Height	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	725 mm / 28.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.	750 mm / 29.5 in.
Fuel Capacity	3.40 litres / 0.90 gallons	3.30 litres / 0.87 gallons	3.30 litres / 0.87 gallons	3.30 litres / 0.87 gallons	3.30 litres / 0.87 gallons	3.30 litres / 0.87 gallons	3.30 litres / 0.87 gallons	3.50 litres / 0.92 gallons	3.50 litres / 0.92 gallons	3.50 litres / 0.92 gallons	3.50 litres / 0.92 gallons	3.50 litres / 0.92 gallons	3.50 litres / 0.92 gallons	3.50 litres / 0.92 gallons	3.50 litres / 0.92 gallons	3.50 litres / 0.92 gallons	3.50 litres / 0.92 US gallons	3.50 litres / 0.92 US gallons	3.50 litres / 0.92 US gallons	3.70 litres / 0.98 US gallons
Displacement (cc)	64.85 cc	64.89 cc	64.90 cc	64.90 cc	64.90 cc	64.90 cc	64.90 cc	64.90 cc	64.90 cc	64.90 cc	64.85 cc	64.85 cc	64.85 cc	64.85 cc	64.85 cc	64.85 cc	64.9 cc	64.9 cc	64.9 cc	64.9 cc
Ground Clearance (in.)	11.4 inches	11.4 inches	11.4 inches	11.4 inches	11.4 inches	11.4 inches	11.0 inches	11.0 inches	11.0 inches	11.0 inches	11.0 inches	11.0 inches	11.0 inches	11.0 inches	11.0 inches	11.0 inches	11.0 inches	11.0 inches	11.0 inches	11.0 inches

Key Specifications

Engine

Single cylinder, two-stroke

Power

Not published by manufacturer

Torque

Not published by manufacturer

Top Speed

Not published by manufacturer

Weight

53 kg / 116.8 lbs

Fuel Capacity

3.50 litres / 0.92 gallons

Full 2018 KTM 65 SX Specifications

Colours Orange/white/black

Ground Clearance (in.) 11.0 inches

Ground Clearance (mm) 280 mm

Seat Height 750 mm / 29.5 in.

Wheelbase 1,137 mm / 44.8 in.

Dry Weight 53 kg / 116.8 lbs

Fuel Capacity 3.50 litres / 0.92 gallons

Bore x Stroke (in,) 1.8 x 1.6 inches

Bore x Stroke (mm) 45.0 x 40.8 mm

Displacement (cc) 64.85 cc

Displacement (ci) 3.96 cubic inches

Engine Type Single cylinder, two-stroke

Engine Detail Reed intake

Fuel System Carburettor. Mikuni TMX

Engine Lubrication Mixture oil lubrication

Ignition AET digital EMS

Starter Kick

Clutch Wet, multi-disc clutch, Formula hydraulics

Final Drive Chain

Gearbox 6-speed

Primary Drive 14:48. Primary drive: 23:75 straight cut spur gear.

Frame Type Central-tube frame with double-cradle

Suspension - Front WP upside-down ? 35 mm

Suspension - Rear WP shock absorber

Rake 25.5°

Wheel Travel - Front 215 mm / 8.5 in.

Wheel Travel - Rear 270 mm / 10.6 in.

Brakes - Front Diameter (in.) 7.8 inches

Brakes - Front Diameter (mm) 198 mm

Brakes - Rear Diameter (in.) 6.3 inches

Brakes - Rear Diameter (mm) 160 mm

Brakes - Front Single disc. Four-piston calipers. Wave brake discs.

Brakes - Rear Single disc. Two-piston calipers. Wave brake discs.

Rims Black anodized, aluminum rims

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