What category is the 2021 KTM 390 Duke?

The 2021 KTM 390 Duke has a Category of Naked bike.

What is the engine size of the 2021 KTM 390 Duke?

The 2021 KTM 390 Duke has a Capacity: of 373.0 ccm (22.76 cubic inches).

What type of engine does the 2021 KTM 390 Duke have?

The 2021 KTM 390 Duke has a Engine type of Single cylinder, four-stroke.

What is the engine power of the 2021 KTM 390 Duke?

The 2021 KTM 390 Duke has a Power of 44.0 HP (32.1 kW).

What is the torque of the 2021 KTM 390 Duke?

The 2021 KTM 390 Duke has a Torque of 37.0 Nm (3.8 kgf-m or 27.3 ft.lbs).

Is the 2021 KTM 390 Duke air cooled or liquid cooled?

The 2021 KTM 390 Duke has a Cooling system of Liquid.

How many gears does the 2021 KTM 390 Duke have?

The 2021 KTM 390 Duke has a Gearbox of 6-speed.

How much does the 2021 KTM 390 Duke weigh?

The 2021 KTM 390 Duke has a Dry weight of 150.0 kg (330.7 pounds).

What is the seat height of the 2021 KTM 390 Duke?

The 2021 KTM 390 Duke has a Seat height of 830 mm (32.7 inches) If adjustable, lowest setting..

KTM 390 Duke - 2021 Specifications and Reviews

The 2021 KTM 390 Duke is a lightweight naked bike ideally suited for beginner and intermediate riders seeking an affordable entry into sportier motorcycling. Its nimble 373cc single-cylinder engine delivers 44 horsepower with sharp handling and aggressive styling, making it a popular choice for urban commuting and weekend riding. Known for excellent value, reliability, and approachable performance, the Duke 390 represents KTM's accessible performance platform.

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2021

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General information
Category	Naked bike
Year	2021
Model	KTM 390 Duke
Engine and Transmission Specifications
Clutch	Wet multi-disc clutch / mechanically operated
Transmission type	Chain (final drive)
Gearbox	6-speed
Cooling system	Liquid
Lubrication system	Wet sump
Ignition	Bosch EMS
Fuel control	Double Overhead Cams/Twin Cam (DOHC)
Fuel system	Injection
Valves per Cylinder	4
Bore x Stroke	89.0 x 60.0 mm (3.5 x 2.4 inches)
Torque	37.0 Nm (3.8 kgf-m or 27.3 ft.lbs)
Power	44.0 HP (32.1 kW)
Engine type	Single cylinder, four-stroke
Capacity:	373.0 ccm (22.76 cubic inches)

Brakes, suspension, Frame and wheels
Wheels	Alloy wheels
Rear brakes	Single disc. ABS. Single-piston floating calliper.
Diameter	320 mm (12.6 inches)
Front brakes	Double disc. ABS. Four-piston radial fixed calliper.
Rear tire	150/60-17
Front tire	110/90-17
Rear wheel travel	150 mm (5.9 inches)
Rear Suspension	WP Apex monoshock
Front wheel travel	142 mm (5.6 inches)
Front Suspension	WP Apex Ã˜ 43 mm
Rake (fork angle)	24.0°
Frame type	Steel trellis frame, powder coated
Physical measures and capacities
Reserve fuel capacity	3.46 litres (0.91 US gallons)
Fuel capacity	13.40 litres (3.54 US gallons)
Wheelbase	1357 mm (53.4 inches)
Ground clearance	175 mm (6.9 inches)
Seat height	830 mm (32.7 inches) If adjustable, lowest setting.
Power/weight ratio	0.2933 HP/kg
Dry weight	150.0 kg (330.7 pounds)
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Light	LED headlight
Starter	Electric
Color options	Black/orange/white

Performance Profile & Rider Fit

44 hp

Peak Power

4.2s

0-60 mph

Best For

Track68%

City88%

Cornering85%

Daily Riding78%

Touring32%

Passenger35%

Rider Profile

Best For	Well suited to newer riders progressing beyond a starter bike as well as experienced riders wanting a light, lively single-cylinder machine.
Purpose	Built primarily as a nimble city and canyon-carving streetfighter rather than a long-distance or off-road machine.
Rider Fit	Its low dry weight and slim trellis chassis make it easy to flick around and manageable for riders of varying strength and stature, though the 830mm seat height may challenge shorter riders.
Character	A punchy, single-cylinder naked bike with sharp handling, strong brakes, and an eager, playful attitude that rewards aggressive riding.
Not Ideal For	Not the right choice for riders seeking a plush, wind-protected long-haul tourer or a capable off-road adventure companion.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2021 KTM 390 Duke Rider Ergonomics Assessment

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Feet:

At 830mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with balls of both feet on the 2021 KTM 390 Duke, with a relaxed knee angle of around 125 degrees and a forward-leaning riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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Rider Reviews

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MotorcycleDB Review

The 2021 KTM 390 Duke is a powerful and agile motorcycle that offers both style and performance. With its sleek design and robust 373cc engine, this bike is perfect for riders looking for a thrilling experience on the road. The Duke's lightweight chassis and advanced suspension provide excellent handling, making it a great choice for both city commuting and weekend adventures. The 2021 model also features a full-color TFT display, LED lights, and smartphone connectivity, adding a touch of modern technology to this high-performance machine. Overall, the 2021 KTM 390 Duke is a top contender in the small-displacement sport bike category. Its combination of power, agility, and advanced features make it a standout choice for riders seeking a thrilling and dynamic riding experience. Whether you're a seasoned rider or a newcomer to the sport, the 2021 KTM 390 Duke is sure to impress with its performance and style.