KTM 125 Duke 2026 — Specifications

The most affordable of the Duke line gets an update. Two new color schemes but, more importantly, improved engine management and increased top speed. It’s already making those who cross its path tremble. Because the streets are not quiet: the Dukes prowl, more menacing with each generation. In 2024, KTM completely revised its 125, both structurally and visually. Consider yourselves warned, the fangs are out.

Since its introduction in 2011, the little Duke made a good impression. But it was truly in 2017 that it staked its territory, with a taut and incisive design. It’s raising the stakes again today with an even sharper face, much more prominent shoulders in the style of the 1290 Superduke R, a more muscular rear section, and a new frame.

It’s immediately apparent that Mattighofen is taking a step forward with its beloved little machine. The APEX lateral shock absorber mounting required a new frame assembly (more rigid in torsion) and a swingarm. This rather uncommon configuration (especially on Kawa ER-6 or Ducati Panigale) allows for better adjustment access (preload only), frees up space for the exhaust and airbox, but above all, the Duke can offer more suspension travel while lowering the seat height. It sits 800 mm from the ground. A tour of the Powerparts catalog allows for a higher seat (as well as a Remus exhaust, decorative parts, a muffler covering, etc.). The 43 mm diameter WP APEX inverted fork slides 8 mm more – so all suspensions benefit from 150 mm of travel.

Having reworked the frame, it’s as well to take care of the entire rear end too. KTM removes the steel tube subframe to install a pressure-cast aluminum die-cast cradle. Its design is aggressively stylish, perhaps less “light” visually but paying off on the scale.

The Duke 125 cultivates its image as a stunt bike, and is also one of the most tenacious. This generation is equipped with a Supermoto ABS (the rear can be deactivated) but also responsive in corners. An Up & Down Shifter can also be added as an option.

The engine unit was adapted for the future. Euro5 has been digested by almost all brands; the future is shaping up with E5+ or E5.2. The LC4c mono updates with an optimized cylinder head containing fewer components and less weight. Engineers take the opportunity to revise the gearbox, Ride-by-Wire, and the anti-dribble clutch.

Have you noticed that the front braking system has changed sides!?! It’s not very important, frankly we don’t care, because the essential thing is in its specs. Thanks to the previous electronic upgrade (supermoto cornering ABS) but also the increase in disc size. It goes from 300 mm to 320 mm, still with a Bybre radial 4-piston caliper; while the rear gains 10 mm (240 mm) and a 2-piston caliper instead of one. Quite something for an 8th-liter bike.

This wild street machine was the first to offer a TFT dashboard in the category (in 2017). The type is of course retained, with a 5-inch bonded glass screen and new functions: a stopwatch, a speed limiter function, connectivity with the KTMconnect App to pilot your smartphone, your calls and your music, and the ultimate, illuminated commodos.

This 125 Duke III also revises many small things: a new location for the turn signals, a redesigned front fender, restyled commodos, new footrest supports, a new fork stem, a revised metal tank, more foam in the seats, Michelin Road 5 tires, wheels with fewer spokes – combined with the lighter front brake, the machine announces more agility with its lightened front end. Enough to compensate for the significant overall weight gain. The bike has gone from 139 to 154 kilos! To which must be added 15 liters of fuel (+ 1.6 liter). The mini-Duke weighs 165 kilos at the scales. An increase worthy of a large television.

Where does all this mass come from, when the Duke has made efforts everywhere!?! No info on that…. Even under its belly. The belly pan has disappeared; a blessing, especially with the view of the infamous catalyst; which the old appendage would have judiciously hidden.

That won’t deter the public from this urban prowler. KTM is cultivating the identity of its 125 with an undeniable flair. The price is in line with the ambitions, making the Duke a 125 that is not cheap but that exudes style.

M.B - Manufacturer photos