KTM 390 Duke 0-60 mph in 4.19 seconds
The KTM 390 Duke is one of many entry-level motorcycles that have emerged in the last 10 years or so as of writing.
This makes choosing your first motorcycle even more challenging.
The KTM 390 Duke was introduced in 2013 and is powered by a punchy fuel-injected 373 cc single-cylinder engine.
It is also very light, weighing in at just 138 kg dry. This makes the KTM 390 Duke one of the lighter bikes in the entry-level class, even lighter than some less powerful 250 cc models.
I cannot help but think that KTM took some inspiration from what made the Ducati Monster series so successful.
That motorcycle series has been with us since 1993 and now includes a huge number of models ranging from 400 cc to 1200 cc.
It is a recipe that has certainly stood the test of time. The successful recipe is really quite simple.
The Ducati Monster range proved that a simple, successful formula could stand the test of time: a punchy engine wrapped in a lightweight trellis frame, paired with strong brakes and good suspension.
While newer Monsters have moved away from this pure mantra, especially in the entry-level models like the M400, M600, and M900, the core idea remains alive today across many brands and models.
One of the best examples is the KTM 390 Duke.
Despite KTM’s heavy use of orange, which may not appeal to everyone, the 390 Duke is an extremely attractive little motorcycle.
It has been highly successful in sales for good reason.
Unlike many entry-level bikes that are essentially parts-bin specials and cut corners on suspension and brakes to hit a competitive price, the 390 Duke feels like a shrunken big bike.
It comes with a quality trellis chassis and proper components that deliver excellent stopping power and handling.
It is powered by a lively 373 cc single-cylinder engine and weighs just 138 kg dry, making it one of the lightest and most agile options in its class.
The 390 Duke also has a racier sister model, the RC 390, which uses essentially the same mechanical package wrapped in sporty full fairings.
KTM 390 Duke Engine Performance and Dyno
KTM’s entry into road-going motorcycles is relatively recent, but the Austrian brand has decades of experience building and racing highly competitive dirt bikes.
Their off-road machines are almost exclusively powered by small, lightweight, high-output single-cylinder engines known for strong torque and punchy performance.
The KTM 390 Duke’s compact, liquid-cooled, fuel-injected 373 cc single-cylinder engine is far from a budget unit thrown together for a basic commuter bike.
Instead, it is a serious performance engine designed to deliver real thrills, and it does exactly that. It produces an impressive 42 horsepower between 8,500 and 9,000 rpm and around 27 ft-lb of torque at 7,500 rpm.
These are strong figures for a small-capacity single. Many small engines feel flat and lifeless, with peaks and troughs that come across as weak.
The 390 Duke’s motor, however, is full of character and excitement.
It delivers its power in a lively, engaging way that reminds many riders of a baby version of the 1997 Suzuki TL1000S.
The 390 Duke also has enough poke to lift the front wheel with just the power in first gear, a trick that very few sub-400 cc entry-level motorcycles can manage.
This wheelie-friendly behaviour is helped by its short first gear and the class-leading low weight of just 138 kg dry (153 kg wet).
Of course, the powerful little engine plays the biggest role.
Despite its compact size, the KTM 390 Duke rides and feels like a much larger motorcycle.
Many riders are surprised to learn it only makes 42 horsepower, because it feels significantly stronger.
This is a real credit to KTM’s design team and their ability to wrap such a potent engine in an extremely lightweight chassis.
For comparison, the Suzuki GSX250R weighs 178 kg wet.
The single-cylinder engine revs eagerly, with a redline around 10,600 rpm. It has three distinct characters depending on how you ride it.
KTM 390 Duke in-gear acceleration
Below 5,000 rpm, the engine feels slightly vibey and coarse, but it delivers a nice, flat torque curve.
Thanks to the low gearing in the first three gears, the bike remains responsive and eager even at lower revs.
Combined with the lightweight chassis, this makes the 390 Duke punchy and quick off the line, especially in town and at everyday speeds.
Between 5,000 and 6,000 rpm, you get a strong surge in power and torque that is enough to lift the front wheel in first gear with very little effort.
Keep revving past 6,500 rpm, and another rewarding kick arrives, adding to the excitement and making the bike feel lively and engaging.
While it does not rev quite as high as some of its main rivals – such as the Yamaha MT-03, Kawasaki Z400, and Ninja 400, the 390 Duke is actually punchier in the first three gears than all of them.
If someone told me this was a 500 cc single, I would almost believe them. Great job, KTM.
Speed in Gears at 5000 rpm
| Speed at 5000 rpm | KTM 390 Duke |
| Speed 1st Gear | 16.8 mph |
| Speed 2nd Gear | 24.1 mph |
| Speed 3rd Gear | 31.5 mph |
| Speed 4th Gear | 39.2 mph |
| Speed 5th Gear | 46.8 mph |
| Speed 6th Gear | 55.3mph |
KTM 390 Duke quarter mile in 13.30 seconds
The KTM 390 Duke is a seriously quick little motorcycle. It not only performs well in a straight line but is also very responsive when shifting gears.
This is especially impressive given its small engine capacity. Unlike many rivals, it does not need high revs or the perfect gear to deliver strong acceleration.
It is rare to hear that a sub-400 cc road bike’s 0-60 mph time was hindered by wheelies, yet it can be true for the 390 Duke.
If you are fully committed and chasing the quickest times, the front wheel will lift willingly in first gear.
Even so, the KTM 390 Duke achieves an impressive 0-60 mph time of 4.19 seconds when using an aggressive clutch launch at around 7,000 rpm.
It covers 0-100 km/h in just 4.34 seconds.
Unlike the Kawasaki Ninja 400, the KTM 390 Duke requires third gear and an extra gear change to reach 60 mph, which costs it a little time in the sprint.
If you launch by slipping the clutch in a more controlled manner, 0-60 mph times typically fall into the very high 4-second or mid-5-second range.
Stronger times are possible with an aggressive clutch dump, but this method is inconsistent.
The bike will wheelie more often than not, which usually ruins your elapsed time.
For the very best 0-60 mph runs, you need to take first gear right up to the rev limiter, then shift into second and quickly change up to third gear between 9,500 and 10,000 rpm.
Miss that window, and you will lose valuable time.
For the best quarter-mile elapsed times, the same precise shifting applies when changing from third to fourth and from fifth to sixth.
You need to shift around the 9,500-10,000 rpm mark, otherwise you will lose time.
The KTM 390 Duke covers 0–100 mph in a brisk 15.73 seconds.
This is noticeably slower than the Kawasaki Ninja 400. With its naked design, the 390 Duke suffers more from wind resistance, so a fairing or effective rider tuck would likely improve the time.
However, its gearing and power delivery in the upper part of each gear also play a role. On the dyno, the Ninja 400 holds onto its power longer in each gear, giving it better top-end acceleration.
When everything is executed perfectly, a strong launch and precise shifts at the right rpm, the 390 Duke runs the quarter mile in 13.30 seconds with a terminal speed of 96.3 mph.
I must emphasise again: if you over-rev each gear too far, even with a good launch, your times will easily slip into the mid-14-second range.
The engine is a real peach, but for the quickest runs it demands disciplined, precise gear changes at specific rpm points rather than simply revving it out.
The KTM 390 Duke has a top speed of 106.3 mph.
As a naked bike with only 42 horsepower at the wheel, it cannot match the top speeds of its faired rivals.
Other testers have seen over 110 mph in ideal conditions and with lighter riders, but results depend heavily on rider size, weight, and weather on the day.
On the road, the 390 Duke is genuinely fun to ride, and the engine loves to be worked hard. Like most small-capacity motorcycles, it shines brightest on slower, twisty roads, but it still has enough power for confident highway overtakes.
This machine really thrives in the city or on tight, twisty back roads, where its responsive engine and light weight make it feel perfectly at home.
For all-round fun and performance, the KTM 390 Duke is right up there.
It offers stronger acceleration than the Ninja 300 and Yamaha YZF-R3. It may not be the outright fastest in a straight line, but point-to-point, it is highly effective for its size and sits among the best in class.
| KTM 390 Duke Acceleration | |
| Speed | Time |
| 0-10 mph | 0.51 |
| 0-20 mph | 1.01 |
| 0-30 mph | 1.53 |
| 0-40 mph | 2.22 |
| 0-50 mph | 3.20 |
| 0-60 mph | 4.19 |
| 0-70 mph | 5.71 |
| 0-80 mph | 7.74 |
| 0-90 mph | 10.70 |
| 0-100 mph | 15.73 |
| 0-110 mph | N/A |
| SS/QM | 13.30/96.3 mph |
| SS/KM | 26.386/105 mph |
| SS/Mile | 39.083/106.3 mph |
| Top Speed | 106.3 mph |
