2025 · Naked Bike · Buyer's Guide
Scalpel-Light Middleweight Carver
The 790 Duke is built around a 799 cc liquid-cooled parallel twin making 105 hp at 9,000 rpm and 64 lb-ft at 8,000 rpm, hung in a chromium-molybdenum steel trellis frame that keeps the whole bike down to 417 lb wet. That combination is what puts it where it sits in the middleweight naked class: enough torque to make a back road interesting in one gear, enough top-end to justify the tach. KTM Motorcycle Traction Control (MTC), cornering ABS, ride modes and KTM Ride-by-Wire engine maps are standard, along with a TFT display, slipper clutch and USB port.
On the road it asks you to commit and then pays you back for it. Steering is light, lean clearance is generous, and the front end feeds back enough that you trust it early in a corner. Chain final drive, straightforward servicing and a deep parts catalog mean it ages well for a rider who turns their own wrenches. This one is for people who spend weekends hunting corners and still need the bike to work in Monday traffic. The honest caveats: the fork is fixed at the factory setting, the 3.7 gal tank is modest even with 53 mpg on your side, and several pieces buyers assume are standard (quickshifter, cruise control, tire pressure monitoring) sit on the options list.
Spec sheets don't ride bikes, but they set the baseline.
| Power | 105 hp (77 kW) @ 9,000 rpm |
|---|---|
| Torque | 64 lb-ft (87 Nm) @ 8,000 rpm |
| Displacement | 799 cc |
| Engine | Parallel twin |
| Cooling | Liquid-cooled |
| Gearbox | 6-speed |
| Final drive | Chain |
| Fork | Upside-down (USD) |
| Front brake | 300 mm |
| Front tire | 120/70-17 |
| Rear tire | 180/55-17 |
| Wheelbase | 58.1 in (1475 mm) |
| Seat height | 32.5 in (825 mm) |
| Wet weight | 417 lb (189 kg) |
| Fuel capacity | 3.7 gal (14 L) |
| Top speed | 140 mph (225 km/h) |
| Fuel economy | 53 mpg (US) |
Equipment check
Chassis
Connectivity
Drivetrain
Lighting
Safety
The first thing you notice throwing a leg over is how narrow it is between your knees. Nothing about 32.5 in feels friendly at a stoplight, and then the bike shrinks the moment it starts rolling. The bars are wide and flat, your wrists carry almost no weight, and the pegs sit high enough that your knees are folded more than a long day really wants. The twin sounds hard and mechanical down low and gets genuinely loud up top, with a fine buzz through the pegs at steady highway speed that stays a texture rather than a problem. Wind pressure does the rest of the work on your chest. At 70 mph you wear all of it, which is exactly why 55 on a good back road already feels like something. The TFT stays readable in bright California sun, and the mirrors do their job.
Engine misfire around 3000 RPM
At least one owner reported a persistent misfire at cruising RPM, requiring replacement of flywheels and ignition sensors.
Where this KTM 790 Duke pulls ahead of — or falls behind — its rivals on the numbers, and the typical bike in its class on character.
Power
Torque
Displacement
Wet weight
Top speed
Seat height
Forget spec-sheet bragging. Here's who the 790 Duke is actually built for.
For Angeles Crest weekends this is close to ideal: light, sharp, and generous with lean angle. You'll want the quickshifter option, and you'll be planning gas stops on the longer loops.
Made for Angeles Crest Highway · Coronado Trail / US 191 · Highway 1 / Big Sur
It handles city miles better than its attitude suggests and comes alive on Skyline. Just know that smartphone connectivity and cruise control are options, not standard equipment.
Made for Bay Area Ridge Roads · San Francisco / Bay Area · Skyline Boulevard / Alice's Restaurant
On tight, repetitive East Coast twisties the light steering and honest front-end feedback let you work on lines instead of wrestling the bike. Skill goes up faster than speed does.
Made for Back of the Dragon · Blue Ridge Parkway · Cherohala Skyway
If you're cross-shopping the older generation, here's what changed.
Previous generation · 2023–2024
The Scalpel That Bites Back
Compare to the previous model →If this one isn't quite the fit, these are the bikes worth riding back-to-back against it.
Any price note compares both bikes at the same age — the youngest age both have on the used market — against this KTM 790 Duke. “cheaper/pricier” is what that bike costs second-hand, not how worn it is.
Competitor · 2024
Triple That Corners On Rails
Roughly $1,600 pricier used than this bike at 1 yr
Competitor · 2024
Moto2 Soul, Street Triple Weight
Roughly $1,600 pricier used than this bike at 1 yr
Same Platform · 2025
Orange Dirt Weapon, Street-Legal
Roughly $5,300 pricier used than this bike at 1 yr