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2024 KTM 390 Duke Overview
KTM 390 Duke is a sport motorcycle, displacing 398.7 cc. Power comes from a Four stroke, single cylinder, DOHC with finger followers, 4 valves engine, a compression ratio of 12.6:1. On the performance side, it delivers 33 kW @ 8500 rpm of peak power and 39 Nm @ 7000 rpm of torque. On the road, the 2024 390 Duke tips the scales at 165 kg, carries a 15 L fuel tank and spans a 1357 mm wheelbase. That's roughly 37.7 kg lighter than the average sport motorcycle in our database. The full 2024 KTM 390 Duke spec sheet below covers every technical detail, from suspension travel to tyre sizes.
2024 390 Duke - Pros & Cons
Strengths
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⚡
Strong power output: With 33 kW @ 8500 rpm and 39 Nm @ 7000 rpm of torque on tap, the 390 Duke is no slouch for its class.
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🔧
Fuel injection: Fuel injection means consistent cold starts and clean throttle response without the fussiness of a carbureted setup.
Considerations
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⚙️
Chain final drive upkeep: Budget time for routine chain maintenance - it's cheap to replace but needs consistent attention to avoid premature sprocket wear.
Wear Points & Servicing Notes
Cooling system servicing
390 Duke's Liquid Cooled setup is low-maintenance provided the coolant interval is kept - old, acidic coolant is the main cause of long-term corrosion in the water passages.
Fuelling & injector care
The Bosch fuel injection on the 390 Duke needs little beyond good fuel and periodic use of an injector-cleaner additive - no jetting or float-bowl maintenance to worry about.
Brake disc and pad wear
Braking up front comes from Single 320 mm disc, 4 piston radial fixed caliper - solid stopping power, with disc and pad wear best checked on the same schedule as tyre changes.
Suspension condition on used examples
The 390 Duke's suspension runs 43mm WP APEX 43 at the front. The rear uses WP APEX - Monoshock. Fork-seal condition and rear linkage play are the two things worth checking before buying used.
Final drive maintenance
The 390 Duke uses chain final drive, which is cheap to replace but needs regular cleaning, lubrication and tension checks to get a full service life out of the sprockets.
Frame & chassis check
Built around a Steel trellis frame, powder coated, the 390 Duke's chassis is straightforward to inspect: look for corrosion, cracks or repair welds around stress points like the head-stock and swingarm mounts.
390 Duke - Buying & Maintenance Guide
What to check before buying
Before handing over money for a used 2024 KTM 390 Duke, cover the fundamentals: service book and oil change history, chain and sprocket wear, and any sign of oil weeping around the casings. Cold-starting it yourself tells you a lot - a healthy 390 Duke should catch quickly and settle into a smooth idle.
Oil and filter changes
Nothing protects a 390 Duke's engine like disciplined oil changes - stay on the manufacturer's schedule (roughly every 6,000 km or annually). Match the viscosity grade to what the owner's manual specifies, not what's cheapest.
Fuel system care
Fuel injection on the 390 Duke needs little attention beyond decent fuel and an occasional system-cleaner additive. Anything left standing for three months or more should have its fuel drained and replaced before it varnishes the injectors.
2024 KTM 390 Duke - Frequently Asked Questions
What engine does the 2024 KTM 390 Duke have?
The 2024 KTM 390 Duke uses a Four stroke, single cylinder, DOHC with finger followers, 4 valves engine with 398.7 cc of displacement. It is liquid cooled.
How much does the 2024 KTM 390 Duke weigh?
The 2024 KTM 390 Duke weighs 165 kg. This is the manufacturer's wet figure.
How much power does the 2024 KTM 390 Duke make?
The 2024 KTM 390 Duke produces 33 kW @ 8500 rpm of power and 39 Nm @ 7000 rpm of torque. These are peak figures.
What is the fuel tank capacity of the 2024 KTM 390 Duke?
The 2024 KTM 390 Duke has a 15 L fuel tank. At around 5-6 litres per 100 km, that is roughly 250-300 km between stops.
What brakes does the 2024 KTM 390 Duke have?
The 2024 KTM 390 Duke uses Single 320 mm disc, 4 piston radial fixed caliper at the front and Single 240 mm disc, 2 piston floating caliper at the rear.
What tyre sizes does the 2024 KTM 390 Duke use?
The 2024 KTM 390 Duke runs 110/70 R17 M/C 54W TL front and 150/60 R17 M/C 66W TL rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.
What gearbox does the 2024 KTM 390 Duke have?
The 2024 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 |
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| 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 |
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| 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
33 kW / 44.3 hp @ 8500 rpm
Torque
39 Nm / 28.7 lb-ft @ 7000 rpm
Top Speed
Not published by manufacturer
Fuel Capacity
15 L / 4.0 US gal
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Full 2024 KTM 390 Duke Specifications
Year
2024
Make Model
KTM 390 Duke
Wheelbase
1357 mm / 53.4 in
Ground Clearance
190 mm / 7.5 in
Fuel Capacity
15 L / 4.0 US gal
Wet Weight
165 kg / 328 lbs
Displacement
398.7 cc / 24.3 cu-in
Engine Detail
Four stroke, single cylinder, DOHC with finger followers, 4 valves
Bore x Stroke
89 x 64 mm
Compression Ratio
12.6:1
Cooling System
Liquid Cooled
Emissions
EURO5
Engine Management
Bosch EMS with RBW
Fuel Induction
Bosch fuel injection
Lubrication
Wet sump
Starter
Electric
Clutch
PASC antihopping clutch, mechanically operated
Final Drive
Chain 520-X Ring, 14:43
Transmission / Drive
6 Speed
Frame Type
Steel trellis frame, powder coated
Suspension - Front
43mm WP APEX 43
Suspension - Rear
WP APEX - Monoshock
Wheel Travel - Front
150 mm / 5.9 in
Wheel Travel - Rear
150 mm / 5.9 in
Brakes - Front
Single 320 mm disc, 4 piston radial fixed caliper
Brakes - Rear
Single 240 mm disc, 2 piston floating caliper
ABS
Bosch 9.1MP Two Channel ABS (Supermoto ABS)
Tyres - Front
110/70 R17 M/C 54W TL
Tyres - Rear
150/60 R17 M/C 66W TL
Wheels - Front
3.00 R17
Wheels - Rear
4.00 R17
Specifications are compiled from manufacturer documentation and cross-referenced
technical sources, and corrected on an ongoing basis.
Spot an error? Let us know.
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