KTM 390 Adventure X Top Speed, 0-60 Time & Specs Review
TL;DR
- The KTM 390 Adventure X uses a 398.7cc single making a claimed 45 PS (44.4 hp) and 39 Nm (29 lb-ft) of torque.
- KTM doesn’t publish an official top speed or 0-60 figure for the X, and no US-based instrumented test exists yet; expect a real-world top end in the high 90s to low 100s mph based on the shared LC4c platform.
- US MSRP is $6,499 plus a $575 destination charge.
- Seat height is just 32.4 inches (825mm), noticeably lower than the more off-road-focused 390 Adventure R’s 34.3 inches.
- Curb weight is 388 lbs fully fueled, light enough to make this a legitimately good first big-bike option.
390 Adventure X vs. Adventure R: Where the X Fits in the Lineup
The 390 Adventure X is KTM’s street-leaning half of the 390 Adventure lineup, sold alongside the more off-road-focused Adventure R. Both share the same 398.7cc LC4c engine and steel trellis frame, but the X swaps the R’s 21-inch front wheel and long-travel adjustable suspension for a 19-inch front, cast aluminum wheels, and a lower seat.
That trade means less capability on technical trails and a lot more comfort commuting, touring pavement, and riding gravel forest roads. If your idea of “adventure” is mostly paved with the occasional dirt road detour, the X is the one to look at.
KTM introduced both models in January 2025 as a deliberate split strategy, replacing the previous single-variant 390 Adventure. The X also drops some electronics compared to the R: it runs a 5-inch LCD display instead of a full color TFT, and it skips the selectable ride modes and cornering ABS that come standard on its pricier sibling.
What it keeps is the important stuff: the same engine tune, the same 6-speed gearbox with a standard quickshifter option, and the same 232mm of ground clearance.
How Fast Is the KTM 390 Adventure X? Top Speed Explained
KTM does not publish an official top speed for the 390 Adventure X, and as of this writing no US-based GPS-instrumented test of this specific model has been completed by outlets like MotoStatz or Cycle World. That’s a real gap, and I’d rather tell you that than make up a number.
What we do know: the X shares its 45 PS engine and gearing with the 390 Adventure R and draws from the same LC4c architecture as the RC 390, which MotoStatz clocked at 112.5 mph in controlled testing (MotoStatz, 2022).
The Adventure X carries more frontal area from its windscreen and upright ergonomics, plus more weight, so figure on a realistic top speed somewhere in the high 90s to low 100s mph rather than anything past 105. One European spec aggregator lists an estimated 99.4 mph on a closed track, which lines up with that range, though it’s not an instrumented US test and should be treated as a rough estimate rather than a verified figure.
What About 0-60 Time?
Same story here: no official KTM figure and no confirmed instrumented 0-60 test for the Adventure X specifically. The related 390 Duke, which uses a similar tune of the same engine family, ran 0-60 mph in 4.19 seconds in MotoStatz testing (MotoStatz, 2026).
The Adventure X will be a bit slower off the line thanks to extra weight (388 lbs fully fueled versus the Duke’s lighter naked-bike build) and taller adventure gearing, so a realistic estimate lands somewhere in the low-to-mid 5-second range. Treat that as an educated estimate, not a claimed spec, until an outlet runs the actual bike through a timing gate.
Engine and Performance: What the LC4c Single Actually Delivers
The 398.7cc single-cylinder LC4c engine makes a claimed 45 PS (44.4 hp) and 39 Nm (29 lb-ft) of torque through a 6-speed gearbox (KTM, 2026). It’s liquid-cooled, runs a Bosch ride-by-wire throttle system, and meets Euro 5 emissions standards.
In practice, riders report the power delivery is soft below about 5,500 rpm and wakes up considerably above that, meaning you’ll want to keep it spinning if you’re riding aggressively rather than lugging it around town in a tall gear. That’s a normal trait for a high-revving thumper and not a flaw, just something to know before your first ride.
Chassis, Suspension, and Brakes
| Spec | Value |
|---|---|
| Engine | 398.7cc single-cylinder, liquid-cooled |
| Power | 45 PS (44.4 hp) |
| Torque | 39 Nm (29 lb-ft) |
| Transmission | 6-speed |
| Front suspension | WP APEX 43mm open cartridge fork, 200mm travel, non-adjustable |
| Rear suspension | WP APEX shock, 200mm travel, preload adjustable |
| Front brake | 320mm disc, ByBre 2-piston caliper |
| Rear brake | 240mm disc, ByBre 1-piston caliper |
| Seat height | 32.4 in (825mm) |
| Wet weight | 388 lbs (176 kg) fully fueled |
| Fuel capacity | 3.7 gal (14L) |
| Wheels | 19-in front, 17-in rear cast aluminum |
| MSRP | $6,499 + $575 destination |
Source: KTM, 2026; Motorcycle.com, 2025
The suspension setup is the clearest sign of where KTM cut cost versus the R model. That non-adjustable front fork won’t matter much to a commuter or new rider, but if you’re carrying a passenger and luggage on a regular basis, you’ll notice it wallowing more than the R’s fully adjustable setup. The brakes are entry-level ByBre units rather than Brembo, adequate for the bike’s weight but not thrilling in feel.
Wheel sizing matters more than it might look on paper. The 19-inch front and 17-inch rear combo, wrapped in road-biased tires rather than the R’s knobbier rubber, means quicker, lighter steering on pavement and in tight parking-lot maneuvers.
It also means the X won’t shrug off deep gravel or rutted trails the way a 21-inch front wheel does. Riders coming from a dirt bike background will feel that difference the first time they hit a washboard road.
Who the 390 Adventure X Is Actually Best For
This bike makes the most sense for new riders stepping up from a 300-class machine, commuters who want upright ergonomics and some weather protection, and anyone who wants adventure styling without adventure-bike intimidation. The 32.4-inch seat height lets a lot more riders get both feet flat, which matters more than people expect when you’re stopped at a light in traffic.
Experienced dirt riders who actually plan to hit technical trails should look at the 390 Adventure R instead. Its 21-inch front wheel, longer suspension travel, and adjustable WP components are built for that job in a way the X simply isn’t.
Frequently Asked Questions
What is the top speed of the KTM 390 Adventure X?
KTM hasn’t published an official figure, and no instrumented US test exists yet. Real-world top speed likely falls in the high 90s to low 100s mph based on the shared engine platform and available estimates.
How fast does the KTM 390 Adventure X go 0-60?
There’s no confirmed instrumented test yet. Based on the related 390 Duke’s time and the Adventure X’s added weight, expect somewhere in the low-to-mid 5-second range as a rough estimate.
How much does the KTM 390 Adventure X cost?
US MSRP is $6,499 plus a $575 destination charge, bringing the out-the-door starting price before tax and fees to around $7,074.
What’s the difference between the 390 Adventure X and 390 Adventure R?
The X has a 19-inch front wheel, cast aluminum wheels, a non-adjustable front fork, and a lower 32.4-inch seat height. The R has a 21-inch front wheel, fully adjustable WP suspension with more travel, and a taller 34.3-inch seat built for off-road use.
Is the KTM 390 Adventure X good for beginners?
Yes. The low seat height, manageable 388-lb wet weight, and predictable power delivery make it approachable for riders coming off a smaller displacement bike or finishing their first year of riding.
