By NastyNils·
Motorcycle comparison · Naked Bike
KTM 990 Duke (MY2024) vs 390 Duke (MY2024)
KTM 990 Duke vs 390 Duke: which one's easier to live with every day.
Across a rippled mid-corner patch, the KTM 990 Duke's suspension soaks up the hit and the bike doesn't budge off its line. The KTM 390 Duke's light chassis stays in check over that ripple, and it's already pivoting into the next bend. It drops onto the new lean without fighting you.
So which one do you buy?
The 990 Duke has the edge if…
Sporty riding on twisty roads
Inches ahead: 990 Duke
Through a string of corners, the 990 Duke feels a little more eager. The difference is harder acceleration and better suspension. The gap is small, so ride both.
Which one's the smarter buy
More for your money: 390 Duke
The 390 Duke is the better buy at these used prices.
What makes each one tick
990 Duke
The 990 Duke's seat and pegs don't mind a hard Sunday session or a Monday commute, and its damping stays supple enough for daily miles. Once the throttle's pinned, the twin winds out while the optional quickshifter won't let an upshift break the drive. Without it, shifts feel notchy. The front end's still talking on every trail-braked entry.
Nils rode the 990 Duke in Austria in 2024 (NastyNils Testride).
390 Duke
The 390 Duke tips into turns with almost no effort and holds its arc until you're back on the gas early. At walking pace, it's nearly weightless. A hard, late grab at the brake lever leaves the bike sitting flat, and the ABS doesn't pulse back when it steps in. Tight, technical switchbacks keep the bar moving.
Nils rode the 390 Duke in Austria in 2024 (NastyNils Testride).
The Voice of Experience
What actually separates them
- The 990 Duke makes more peak power: 123 hp (90 kW) vs 45 hp (33 kW).
- The 990 Duke makes more peak torque: 76 lb-ft (103 Nm) vs 29 lb-ft (39 Nm).
- The 990 Duke has the larger engine: 947 cc vs 399 cc.
Which one for the way you ride
A confidence-building first motorcycle
Not its job: 990 Duke
No first-bike verdict for the 990 Duke. It's a step up for later.
Comfortable long-distance riding
Both miss here
Long-haul comfort is a weak spot for both. If you tour, shop with that in mind.
They come out level on running costs and commuting. The better-kept used example is the smarter money.
Who each one is built for
What's good, and what you'll live with
990 Duke
Strengths
- A Front End You Can Read
- Clean, Predictable Throttle
- Sporty Yet Daily-Usable
- Deep, Usable Electronics
- Engine flexibility across the rev range
Trade-offs
- Notchy, Abrupt Gearshift
- Tight Fit For Tall Riders
- Brakes Are The Weak Link
- Lost the 890 R's playfulness
- Minimal wind protection
390 Duke
Strengths
- Electronics From A Bigger Class
- Almost Weightless At Walking Pace
- Turns Without Asking For Effort
- Brakes Stay Planted Under Pressure
- A Genuine Wheelie Machine
Trade-offs
- Gearing Too Tall For Traffic
- Firm Suspension On Rough Roads
- Uncomfortable for long distances
Known problems to check before you buy
990 Duke
No confirmed faults on file yet. That's not the same as fault-free.
390 Duke
- Fuel filler cap seal leak (recall NHTSA 25V740) Recall 25V740000 A defective seal on the fuel filler cap may leak fuel; affected models require a seal replacement.
- Electrical glitches and false warning messages Some units display intermittent warnings (e.g., cruise control failure) or experience starting difficulties, often clearing after a restart.
What they cost used
These prices compare a 2-year-old 990 Duke with a 2-year-old 390 Duke.
- 990 Duke
- $9,900
- 390 Duke
- $4,700
Two-year-old KTM 990 Dukes run about $9,900, while KTM 390 Dukes sit near $4,700. That's a $5,200 gap. They're recorded figures, not live listings.
What they share
- Cooling
- Liquid-cooled
- Gearbox
- 6-speed
- Final drive
- Chain
- Fork
- Upside-down (USD)
Where the spec sheets split
| 990 Duke | 390 Duke | |
|---|---|---|
| Seat height | 32.5 in (825 mm) | 32.3 in (820 mm) |
| Dry weight | 395 lb (179 kg) | 355 lb (161 kg) |
| 990 Duke | 390 Duke | |
|---|---|---|
| Displacement | 947 cc | 399 cc |
| Engine | Parallel twin | Single-cylinder |
| Power | 123 hp (90 kW) | 45 hp (33 kW) |
| Torque | 76 lb-ft (103 Nm) | 29 lb-ft (39 Nm) |
| 990 Duke | 390 Duke | |
|---|---|---|
| Fuel economy | 50 mpg (US) / 4.7 L/100 km | 69 mpg (US) / 3.4 L/100 km |
| Fuel capacity | 3.9 US gal (14.8 L) | 4.0 US gal (15 L) |
| 990 Duke | 390 Duke | |
|---|---|---|
| Front brake | 300 mm | 320 mm |
| Front tire | 120/70-17 | 110/70-17 |
| Rear tire | 180/55-17 | 150/60-17 |
| Wheelbase | 58.1 in (1476 mm) | 53.4 in (1357 mm) |
What comes fitted, what costs extra
| 990 Duke | 390 Duke | |
|---|---|---|
| Smartphone Connectivity | Option | Standard |
Head to head, area by area
Both bikes on the same scale, one area at a time.
