Naked Motorcycles

2021KTM 790 Duke

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The 2021 KTM 790 Duke is a lightweight middleweight naked bike for riders who want sharp handling and strong performance. Its liquid-cooled 799cc parallel twin makes 105 hp and 87 Nm through a six-speed gearbox. ABS is standard, with an 825 mm seat, 187 kg wet weight and a 14-litre tank.

Capacity: 799.0 ccm
Engine: Parallel Twin, four-stroke
Gearbox: 6-speed
Dry weight: 169.0 kg
Seat height: 825 mm
Power: 105.0 HP (76.6 kW)

⇄ Compare with another bike ＋ Add to garage All model years

What’s new for the 2021 KTM 790 Duke

vs the 2020

Spec	2020	2021
Power	103.3 HP (77.0 kW) @ 9000 RPM	105.0 HP (76.6 kW)

Other years 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail25%

Cornering92%

City riding85%

Daily riding78%

Touring45%

Two-up40%

Track75%

Best for: Designed as a sharp, lightweight streetfighter for spirited commuting, twisty backroads and occasional trackday fun.
Built for: Playful, aggressive and eager to change direction, with a torquey parallel twin that rewards an energetic riding style.
Not ideal for: Not the right choice for riders seeking long-distance comfort, pillion-friendly touring, or serious off-road capability.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 825mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with balls of both feet on the 2021 KTM 790 Duke, with a relaxed knee angle of around 130 degrees and a forward-leaning riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at 821-900 mm — Long Legs →

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Full specifications

Engine

Capacity: 799.0 ccm
Power: 105.0 HP (76.6 kW)
Torque: 87.0 Nm (8.9 kgf-m)
Engine type: Parallel Twin, four-stroke
Power/weight ratio: 0.6213 HP/kg (dry)
Bore x stroke: 88.0 x 65.7 mm
Cooling system: Liquid
Fuel system: Injection
Starting: Electric
Ignition: Bosch EMS with RBW
Lubrication system: Forced oil lubrication with 2 oil pumps
Spark plugs: LMAR9AI-10

Transmission

Gearbox: 6-speed
Transmission type: Manual
Final drive: Chain
Clutch: PASC™ antihopping clutch, mechanically operated
Sprockets: 16/41 (front/rear)
Chain size: 520

Performance

0-60 mph: 3.10 seconds
0-100 km/h (0-62 mph): 3.30 seconds

Dimensions & weight

Wheelbase: 1475 mm
Seat height: 825 mm
Dry weight: 169.0 kg
Wet weight: 187.0 kg
Fuel capacity: 14.00 litres
Ground clearance: 186 mm
Oil capacity: 2.80 litres
Reserve fuel capacity: 4.40 litres

Chassis & suspension

Frame: Chromium-Molybdenum-Steel frame using the engine as stressed element, powder coated
Front suspension: WP upside-down
Rear suspension: WP shock absorber with Pro-Lever linkage
Front wheel travel: 140 mm
Rear wheel travel: 150 mm
Rake (fork angle): 24.0°
Trail: 100 mm
Fork tube size: 43 mm

Brakes & wheels

Front brakes: Double disc. ABS
Front brakes diameter: 300 mm
Rear brakes: Single disc. ABS
ABS: Yes
Front tyre: 120/70-17
Rear tyre: 180/55-17
Brake fluid: DOT 4 or 5.1
Tire pressure front: 33 PSI (2.3 Bar or 230 kPa)
Tire pressure rear: 38 PSI (2.6 Bar or 260 kPa)

Other

Color options: Orange, black

Specs last verified against published sources: October 2026.

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

What changed, year to year

Differences highlighted

Specification	2018	2020	2021	2023	2025	2027
Capacity	790 cc	799 cc	799 cc	799 cc	799 cc	799 cc
Dry weight	169 kg	169 kg	169 kg	174 kg	174 kg	169 kg
Seat height	825 mm	825 mm	825 mm	825 mm	825 mm	825 mm
Fuel capacity	14 L	14 L	14 L	14 L	14 L	14 L