The first 125cc KTM for the road – for all young people and the young at heart alike. The 125 Duke offers maximum riding fun, thanks to thoroughbred motorcycle technology. The featherweight chassis with high-quality components and first-class brakes guarantees dynamic cornering fun. The refined four-stroke single cylinder with fuel injection and six-gear transmission provides adequate propulsion. And the low fuel consumption ensures a reasonable level of economy. Precisely what you'd expect from a genuine KTM. Also available from 2012 in a stylish grey.
ENGINE
The state-of-the-art, liquid-cooled, single-cylinder four-stroke engine with twin overhead camshafts, four valves and electronic fuel injection has been developed specifically for the 125 Duke. Effortlessly, it achieves peak power of 11 kW (15 hp) and thanks to the balancer shaft, delivers the highest levels of smoothness.
CYLINDER HEAD
Just like the RC8 R, two overhead camshafts in the 125 Duke's cylinder head actuate four valves by means of cam levers. This design is not only extremely reliable, but the cam levers are coated with ultra-hard carbon which minimises friction - releasing even more power.
SILENCER
The compact, three-chamber silencer is positioned close to the machine's overall centre of gravity. This aids centralisation of masses and improves the playful handling of the 125 Duke. Not only noise, but emission levels are also exemplary thanks to the regulated catalytic converter.
INJECTION
The intricate engine design, state-of-the-art injection electronics and the close-ratio, six-speed transmission not only help the 125 Duke to achieve impressive performance, but also moderate fuel consumption. Thanks to the regulated catalytic converter, it produces only minimal emissions
FUEL TANK
The shapely 11 l fuel tank on the 125 Duke not only provides the rider with perfect knee contact, but also with a range of substantially more than 300 km, even when ridden on the edge, thanks to the economic engine.
FRAME
11 kW (15 hp) of power plus an unladen weight of 124 kg guarantee plenty of riding fun with the 125 Duke. The first-class chassis, with lightweight tubular space frame in the proven KTM design, turns it into a real surfer through the curves. Weight grouped close to the centre of gravity maximise manoeuvrability and precision.
TELESCOPIC FORK
The 125 Duke's high-quality upside-down fork from WP Suspension has the same 43 mm outer tube diameter as the RC8 R – in other words, real racing equipment that guarantees highest levels of stability and precision.
SWINGARM
The 125 Duke's lightweight, high-quality, pin-jointed swingarm is designed and produced according to the same principle as the 690 Duke. The light alloy swingarm with directly linked WP shock absorber excels with extreme torsional stiffness and outstanding tracking stability.
WHEELS AND TYRES
Equally lightweight and delicate as they are stable, the 17 in cast light alloy wheels developed by KTM specifically for the 125 Duke provide a 110 mm tyre width at the front and an impressive 150 mm at the rear. The tyres impress with tremendous grip in both wet and dry conditions, as well as providing supreme durability.
BRAKES
With the powerful, outstandingly controllable brake system developed by KTM in collaboration with Brembo® and the perfect grip of the wide tyres, the rider always has the lightweight motorcycle under control. At the front, a radial four-piston brake caliper bites onto a 280 mm brake disc.
ERGONOMICS
The 125 Duke is also a genuine motorcycle in terms of dimensions, providing plenty of space and freedom of movement. The gathered sitting position supports relaxed touring equally as well as committed cornering. Large contact surfaces ensure optimum control and perfect feedback.
FUEL TANK
The shapely 11 l fuel tank on the 125 Duke not only provides the rider with perfect knee contact, but also with a range of substantially more than 300 km, even when ridden on the edge, thanks to the economic engine.
SEAT
For all its sportiness, the two-piece seat provides surprising long-distance comfort, perfect support and first-class ergonomics for rider and pillion. At 810 mm, the seat height is low enough for a secure standing position, but also high enough for sports-oriented use and a genuine big-bike feeling.
BRAKES
With the powerful, outstandingly controllable brake system developed by KTM in collaboration with Brembo® and the perfect grip of the wide tyres, the rider always has the lightweight motorcycle under control. At the front, a radial four-piston brake caliper bites onto a 280 mm brake disc.
OPTIONAL LIMITATION OF MAXIMUM SPEED TO 80
With a modification to the engine electronics, the maximum speed of the 125 Duke can be limited to 80 km/h.
COCKPIT
The 125 Duke has everything that distinguishes a genuine KTM - from the high-quality chassis components to the multi-function cockpit, which even keeps you up to date with fuel consumption and remaining range. The extensive KTM PowerParts range gives you the option of adding your own individual style.
ENGINE
| Design |
1-cylinder 4-stroke engine, water-cooled |
| Displacement |
125 cm³ |
| Bore |
58 mm |
| Stroke |
47.2 mm |
| Performance |
11 kW (15 hp) |
| Starting aid |
Electric starter |
| Transmission |
6 speed, claw shifted |
| Engine lubrication |
Forced oil lubrication with 2 Eaton pumps |
| Primary gear ratio |
22:72 |
| Secondary gear ratio |
14:45 |
| Cooling system |
Liquid cooling system, continuous circulation of cooling liquid with water pump |
| Clutch |
Wet multi-disc clutch / hydraulically operated |
| Ignition system |
Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment, type Kokusan |
CHASSIS
| Frame |
Tubular space frame made from steel tubes, powder-coated |
| Fork |
WP Suspension 4357 |
| Shock absorber |
WP Suspension 4618 EM |
| Suspension travel Front |
150 mm |
| Suspension travel Rear |
150 mm |
| Brake system Front |
Disc brake with two-pot brake caliper |
| Brake system Rear |
Disc brake with one-pot brake caliper, floating brake discs |
| Brake discs - diameter Front |
280 mm |
| Brake discs - diameter Rear |
230 mm |
| Chain |
5/8 x 1/4” (520) O‑Ring |
| Steering head angle |
65° |
| Wheel base |
1,361±15 mm |
| Ground clearance (unloaded) |
170 mm |
| Seat height (unloaded) |
810 mm |
| Total fuel tank capacity approx. |
10.5 l
Unleaded premium fuel (95 RON) |
| Weight without fuel approx. |
125 kg |
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