KTM 390 Duke

KTM launched the 2026 390 Duke with a downsized 350cc engine on April 21, 2026.

The KTM 390 Duke is one of the most exciting motorcycles you can buy in the country. From 2013, KTM kept evolving the Duke with more features, sharper handling and stronger performance. The third generation bike that came in 2023 and was the biggest leap yet, bringing an all-new chassis, updated electronics and a larger 399cc engine.

Now for 2026, KTM has gone in a slightly different direction. While the motorcycle remains visually identical to the current Gen 3 Duke, the biggest change comes under the tank. The 2026 390 Duke gets a downsized 350cc single-cylinder engine, while the existing 399cc version is going to be called the Duke R. The brand has done so to keep the bike’s price in check after GST 2.0 reforms. 

Naturally, I was curious to find out whether this downsized motor still manages to retain the wild and aggressive character that made the 390 Duke so popular in the first place, or whether the performance difference is going to be as massive as the price gap between the 350cc and 399cc bike.

Check out our detailed specifications comparison between the 350cc KTM 390 Duke and the KTM 390 Duke R.

KTM 390 Duke Design

Visually, the 2026 Duke remains unchanged compared to the KTM 390 Duke R, and honestly, that’s not a bad thing at all. It still looks extremely sharp and aggressive, with KTM’s signature streetfighter styling standing out instantly. The split LED headlamp with integrated DRLs, sharp tank extensions and exposed trellis frame continue to give the bike a very purposeful appearance.  

The underbelly exhaust keeps the side profile looking clean and sporty, while the exposed subframe remains one of the coolest design elements on the bike. Especially on the Atlantic Blue and Gunmetal Grey colour schemes, the subframe really pops visually and gives the Duke a premium look. The major difference between the 390 Duke R and the 350 Duke can only be seen in the form of different frame colours. The 350cc Duke 390 gets an all-black frame, while the 390 Duke R gets an orange frame. 

KTM 390 Duke Colours

The 350 Duke is available in three new paint schemes: Black, Atlantic Blue and Gun Metal Grey. All of these colour options look quite striking, but we personally prefer the black shade a bit more, especially as it now gets an all-black frame as well.   

Here is a detailed colours explainer of the 350cc KTM 390 Duke.

KTM 390 Duke Wheels

The lightweight 5-spoke 17-inch alloy wheels have also been carried forward unchanged. Apart from looking sporty, they help reduce unsprung mass, which contributes to the Duke’s agile handling characteristics.

KTM 390 Duke Quality

In terms of overall fit-and-finish, the Duke still feels properly built and solid. The quality levels are good overall, although a few panel gaps around the tank shrouds could certainly have been tighter. But as a complete package, the bike doesn’t feel cheap or poorly put together in any way.

Features 

The 2026 Duke continues with the same electronics package as before, including cornering ABS, traction control, cruise control and riding modes. The TFT display remains crisp and easy to read, while features like Launch Control and Track Mode continue to add to the sporty appeal of the motorcycle.

Bluetooth connectivity and navigation are still present, although the navigation system continues to feel less polished compared to simply using Google Maps on a mounted smartphone. Cruise control remains one of the most useful features on long highway rides and genuinely helps reduce fatigue over extended journeys.

Check out our detailed features explainer of the KTM 390 Duke.

Ride Quality 

The suspension setup continues to feel slightly firm, especially over broken roads. You can definitely feel smaller bumps and imperfections through the chassis, but the bike never feels harsh or unsettled. Even over larger potholes and rough patches, the Duke maintains composure impressively well.

The biggest advantage here is adjustability. Riders can easily tweak the suspension setup according to their weight and riding preference.

Rider Comfort

The riding triangle strikes a really good balance between sporty and comfortable. The 800mm seat height remains accessible for most riders, while the long seat gives you enough room to move around during longer rides. That said, taller riders should opt for the 820mm seat as it relaxes the lower body posture a bit.

The seat foam is still on the firmer side, but it provides decent support over longer distances. Taller riders however may still find the rear-set footpegs slightly cramped after spending long hours in the saddle.

Pillion Comfort

The lower and slightly wider pillion seat on this bike is quite comfortable for a Duke, but is not the best and most comfortable pillion seat out there. The footpeg placement though, is quite sensible, ensuring your knees don’t end up folded awkwardly on longer rides.

KTM 390 Duke Engine

The biggest update for 2026 is the downsized 349cc single-cylinder liquid-cooled engine. It is essentially the same motor, but with a shorter stroke size (from 64mm to 56.15mm), and some minor internal updates, while the bore size remains untouched at 89mm. This new engine produces 41.5PS at 8,600rpm and 33.5Nm at 7,000rpm, which on paper is 4.5PS and 5.5Nm lower than the 390 Duke R. That said, the performance gap isn’t just noticeable on paper, but you can clearly feel it the moment you start riding the new bike.

Unlike the 399cc Duke R which delivers strong acceleration almost everywhere in the rev range, this downsized engine feels noticeably slower, especially during initial acceleration and mid-range roll-ons. In fact, during testing, the new Duke ended up being roughly 1.2 seconds slower in the 0-100kmph sprint compared to the Duke R.

KTM 390 Duke City Performance

In the city, the new engine feels much calmer and less aggressive than the 399cc unit. The low-end response is smooth and quite manageable, but the punchy midrange grunt that the 390 Duke R offers is largely missing here. 

From around 3000rpm to 5000rpm, acceleration feels fairly flat and not as exciting as the 390 Duke R. Overtakes require a bit more planning now, especially if you’re riding in higher gears, and lower speeds. It’s only once the tachometer crosses around 7000rpm that the engine finally starts feeling alive and delivers the sharp top-end rush you’d normally associate with a KTM.

That said, the softer power delivery does make the bike easier to ride in traffic. The throttle response feels smoother and less jerky at low speeds, making stop-and-go riding less tiring than before.

KTM 390 Duke Highway Performance

Out on the highway, the new 349cc motor feels far more refined compared to the older engine. Whether I was cruising at triple digit speeds or revving the bike hard through the gears, vibrations were impressively well controlled. 

Unlike the older Dukes that always had a noticeable buzz through the handlebars and footpegs, this new engine feels much smoother and more mature overall. Even after spending long hours on the highway, the bike never really became tiring from a vibration standpoint.

Performance-wise though, the lack of strong midrange is quite evident during highway overtakes. You often need to downshift and keep the engine spinning higher in the rev range to extract quick acceleration.

KTM 390 Duke Gearbox

The 6-speed gearbox continues to be slick and precise. Shifts feel smooth whether you’re riding aggressively or casually in traffic. The quickshifter has also been retained and works well for the most part, especially when riding harder at higher rpm.

KTM 390 Duke Mileage

The smaller engine should theoretically improve fuel efficiency slightly, although the exact mileage figures will depend heavily on riding style. Given the calmer nature of this engine, touring range remains quite practical with the 15-litre fuel tank.

KTM 390 Duke Underpinnings

Mechanically, the chassis and suspension setup remain unchanged. You still get the sharp steering geometry, adjustable WP suspension and lightweight construction that made the 390 Duke R such a brilliant handler. At 168kg, the kerb weight remains the same as well, and the bike still feels light, agile and extremely flickable.

KTM 390 Duke City Handling

Inside the city, maneuvering through traffic feels effortless thanks to the compact proportions. It also makes U-turns and tight filtering much easier.

KTM 390 Duke Highway Handling

At highway speeds, the Duke feels planted and confidence inspiring. Quick direction changes feel natural and the chassis always communicates clearly what the tyres are doing underneath you.

KTM 390 Duke Cornering

The handling remains one of the biggest highlights of this motorcycle. Whether riding through twisty roads or attacking corners on a racetrack, the Duke feels incredibly sharp and confidence inspiring. It tips into corners eagerly while remaining stable once leaned over.

Even with the smaller engine, the chassis still feels like one of the best handling setups in the segment. The only downside is the lack of torque. While cornering the engine needs to be in the powerbrand to make a quicker corner exit, unlike the 390 Duke R, in which the extra torque does all the work for you.

KTM 390 Duke Brakes

Braking performance remains excellent thanks to the 320mm front disc with a radial caliper and Brembo sintered brake pads, while at the rear it gets a 240mm disc setup. The brake feel is sharp, progressive and easy to modulate.

The cornering ABS system works well in the background without feeling overly intrusive, while SuperMoto ABS continues to add an extra layer of fun on loose surfaces.

KTM 390 Duke Tyres

The Apollo Alpha H1 tyres offer decent grip levels for most riding conditions, though when pushed really hard into corners, they still feel slightly vague at high lean angles. Also, the wet grip is not that confidence inspiring but these are significantly better than the Metzeler Sportec M5 H-rated tyres that were previously available with the bike.

Verdict 

The 2026 KTM 390 Duke still remains one of the sharpest and most exciting handling motorcycles in its segment. Its aggressive styling, brilliant chassis and extensive electronics package continue to make it feel like a very modern naked bike.

However, the new 349cc engine changes the personality of the motorcycle quite significantly. While it is now far smoother and more refined than before, it has also lost a large chunk of the raw aggression and explosive midrange punch that made the older Duke feel so exciting. That said, the price difference between the 350 Duke and 390 Duke R is over Rs 60,000. It is a lot of money and a bit too much to pay for the extra performance, even for a KTM. 

If you primarily value refinement, everyday usability, and want to save your Rs 60,000, this new engine will probably feel easier to live with. But if you were someone who is not sensible enough and loved the manic, aggressive performance character of the 399cc Duke, this downsized version might leave you slightly disappointed.

Rivals 

Triumph Tracker 400

Priced at Rs 2.46 lakh (ex-showroom, Delhi), the Triumph Tracker 400 is a lot more affordable than the 2026 390 Duke. It also comes with a 349cc engine that produces almost similar power and torque as the Duke, but the Tracker 400 lacks in terms of features. It is a good option for those who want a sporty bike with retro looks, and are not too fussy about features.

Royal Enfield Guerrilla 450

The Royal Enfield Guerrilla 450 is one of the sportiest bikes from Royal Enfield. Its price starts at Rs 2.49 lakh (ex-showroom, Chennai), making it cheaper than the 390 Duke. It comes with a 452cc engine, that makes similar power as the 2026 Duke, but a lot more torque, that gives it a strong mid-range grunt. The Guerrilla 450 sits as a great option for those who want a sporty neo-retro bike.

TVS Apache RTR 310

TVS Apache RTR 310 is almost as loaded as the 390 Duke in terms of features, but comes with a smaller 312.2cc engine that makes less power and torque than the KTM. That said, with prices starting at Rs 2.23 lakh (ex-showroom, Delhi), it is easily one of the most affordable, feature loaded and performance oriented sub 500cc bikes in India.