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2018 KTM 390 Duke Specifications

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2018 KTM 390 Duke Overview

The 2018 KTM 390 Duke is a sport motorcycle built around 373 cc of displacement. Under the tank sits a Four stroke, single cylinder. DOHC with finger followers, 4 valves engine, a compression ratio of 12.6:1. 2018 KTM 390 Duke delivers 43.5 hp @ 9500 rpm of peak power and 3.6 kg-m of torque. From a practical standpoint, the 2018 390 Duke tips the scales at 149 kg, carries a 13.4 L fuel tank, offers a seat height of 830 mm and spans a 1357 mm wheelbase. Scroll down for the complete 2018 KTM 390 Duke spec sheet covering every technical detail from suspension travel to tyre sizes.

2018 390 Duke - Pros & Cons

Strengths

  • Strong power output: 2018 KTM 390 Duke makes 43.5 hp @ 9500 rpm with 3.6 kg-m of torque - competitive figures for its class.

Considerations

  • Tall seat height: The 830 mm seat height will challenge shorter riders - tiptoeing at low speeds is something to factor into your decision.

Owner Experiences & Common Issues

General ownership notes

The 2018 KTM 390 Duke has built a reputation for solid everyday reliability when serviced to schedule. As with any motorcycle of this era, documented service history is the single biggest indicator of long-term reliability when buying used.

390 Duke - Buying & Maintenance Guide

What to check before buying

When inspecting a used 2018 KTM 390 Duke, start with the basics: check the service book for oil change frequency, inspect the chain and sprockets for wear, and look for oil seepage around the engine casings and rocker covers. A cold start test is invaluable - a well-maintained 390 Duke should fire up cleanly and settle to a smooth idle within a few seconds.

Oil and filter changes

Regular oil changes are the single most important maintenance task on any 390 Duke. Stick to the manufacturer's interval - typically every 6,000 km or once a year, whichever comes first. Always use the correct viscosity grade as specified in the owner's manual.

2018 KTM 390 Duke - Frequently Asked Questions

What engine does the 2018 KTM 390 Duke have?
The 2018 KTM 390 Duke uses a Four stroke, single cylinder. DOHC with finger followers, 4 valves engine with 373 cc of displacement. It is liquid cooled.
How much does the 2018 KTM 390 Duke weigh?
The 2018 KTM 390 Duke weighs 149 kg. This is the manufacturer's dry figure.
How much power does the 2018 KTM 390 Duke make?
The 2018 KTM 390 Duke produces 43.5 hp @ 9500 rpm of power and 3.6 kg-m of torque. These are peak figures.
What is the fuel tank capacity of the 2018 KTM 390 Duke?
The 2018 KTM 390 Duke has a 13.4 L fuel tank.
Is the 2018 KTM 390 Duke suitable for shorter riders?
The 2018 KTM 390 Duke has a seat height of 830 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 2018 KTM 390 Duke have?
The 2018 KTM 390 Duke uses Single 320 mm disc, 4 piston radial caliper at the front and Single 230 mm disc 1 piston caliper at the rear.
What tyre sizes does the 2018 KTM 390 Duke use?
The 2018 KTM 390 Duke runs 110/70 -17 front and 150/60-17 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.
What gearbox does the 2018 KTM 390 Duke have?
The 2018 KTM 390 Duke is fitted with a 6 Speed transmission.

KTM 390 Duke Spec Evolution

The KTM 390 Duke was produced across 6 model years (2014-2024). 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 2014 2016 2018 2020 2021 2024
Max Power 32 kW / 43.5 hp @ 9500 rpm 32 kW / 43.5 hp @ 9500 rpm 43.5 hp / 32 kW @ 9500 rpm 43.5 hp / 32 kW @ 9500 rpm 43.5 hp / 32 kW @ 9500 rpm 33 kW / 44.3 hp @ 8500 rpm
Dry Weight 139 kg / 306 lbs 139 kg / 306 lbs 149 kg / 328 lbs 149 kg / 328 lbs 149 kg / 328 lbs -
Engine Detail Four stroke, single cylinder, DOHC with finger followers, 4 valves per cylinder Four stroke, single cylinder, DOHC with finger followers, 4 valves per cylinder Four stroke, single cylinder. DOHC with finger followers, 4 valves Four stroke, single cylinder. DOHC with finger followers, 4 valves Four stroke, single cylinder, DOHC with finger followers, 4 valves Four stroke, single cylinder, DOHC with finger followers, 4 valves
Seat Height 800 mm / 31.4 in 800 mm / 31.4 in 830 mm / 32.7 in 830 mm / 32.7 in 830 mm / 32.7 in -
Fuel Capacity 11 L / 2.9 US gal / 2.4 Imp gal 11 L / 2.9 US gal / 2.4 Imp gal 13.4 L / 3.5 US gal / 2.9 Imp gal 13.4 L / 3.5 US gal / 2.9 Imp gal 13.4 Litres / 3.5 US gal 15 L / 4.0 US gal
Frame Type Steel trellis Steel trellis Steel trellis frame, powder coated Steel trellis frame, powder coated Steel trellis frame, powder coated Steel trellis frame, powder coated
Displacement 373.4 cc / 22.7 cu-in 373.4 cc / 22.7 cu-in 373 cc / 22.7 cu-in 373 cc / 22.7 cu-in 373 cc / 22.7 cu-in 398.7 cc / 24.3 cu-in
Wheelbase 1367 mm / 53.8 in 1367 mm / 53.8 in 1357 mm / 53.4 in 1357 mm / 53.4 in 1357 mm / 53.4 in 1357 mm / 53.4 in

Key Specifications

Engine

Four stroke, single cylinder. DOHC with finger followers, 4 valves

Power

43.5 hp / 32 kW @ 9500 rpm

Torque

3.6 kg-m / 35.3 Nm @7000rpm

Top Speed

N/A

Weight

149 kg / 328 lbs

Fuel Capacity

13.4 L / 3.5 US gal / 2.9 Imp gal

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Full 2018 KTM 390 Duke Specifications

Year 2017 - 18
Make Model KTM 390 Duke
Max Power 43.5 hp / 32 kW @ 9500 rpm
Max Torque 3.6 kg-m / 35.3 Nm @7000rpm
Displacement 373 cc / 22.7 cu-in
Engine Detail Four stroke, single cylinder. DOHC with finger followers, 4 valves
Bore x Stroke 89 x 60 mm
Compression Ratio 12.6:1
Cooling System Liquid Cooled
Fuel Induction Bosch Injection
Ignition Bosch EMS
Lubrication Wet sump
Starter Electric
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KTM 390 Duke - other years

2024 2021 2020 2018 2016 2014
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