Naked Motorcycles
2021KTM 125 Duke
40 fields on record
The 2021 KTM 125 Duke is an agile, lightweight naked bike designed for new riders and commuters seeking accessible performance. Powered by a 15 horsepower single-cylinder engine with modern fuel injection and liquid cooling, it delivers punchy acceleration and sharp handling in a compact, affordable package. Known for its stylish design and reliable daily-use capability, the 125 Duke excels as an ideal entry-level motorcycle for urban riding and learner riders.
- Capacity
- 125.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 6-speed
- Dry weight
- 128.0 kg
- Seat height
- 830 mm
- Power
- 15.0 HP (10.9 kW)
What’s new for the 2021 KTM 125 Duke
vs the 2020| Spec | 2020 | 2021 |
|---|---|---|
| Front suspension | WP upside-down Ø 43 mm | WP Apex Ø 43 mm |
| Rear suspension | WP Monoshock | WP Apex Monoshock |
| Front brakes | Single disc. ABS. Four-pot brake caliper | Single disc. ABS. Four-piston radial fixed calliper |
| Rear brakes | Single disc. ABS. One-pot brake caliper, floating brake | Single disc. ABS. Single-piston floating calliper |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- A nimble entry-level naked built for city commuting, learning throttle and cornering skills, and fun back-road blasts.
- Built for
- A sharp, playful single-cylinder streetfighter that punches above its 15 PS with aggressive KTM styling and eager, flickable handling.
- Not ideal for
- Not for riders wanting highway speed, two-up touring, or off-road duty; the modest 125cc output limits sustained fast cruising.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usRange and running costs
Worked out in your browser - nothing is sent to usBased on the maker's published fuel consumption and tank size. Real-world figures depend on how and where you ride, and the last litres of a tank are reserve. Prices shown greyed are examples - type your own.
Engine
- Capacity
- 125.0 ccm
- Power
- 15.0 HP (10.9 kW)
- CO2 Emissions
- 56 CO2 g/km
- Torque
- 12.0 Nm (1.2 kgf-m) @ 8000 RPM
- Engine type
- Single, four-stroke
- Fuel consumption
- 2.40 litres/100 km (41.7 km/l)
- Power/weight ratio
- 0.1172 HP/kg (dry)
- Bore x stroke
- 58.0 x 47.2 mm
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment, type Kokusan
- Valves per cylinder
- 4
- Lubrication system
- Wet sump
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet multi-disc clutch, mechanically actuated
Dimensions & weight
- Wheelbase
- 1357 mm
- Seat height
- 830 mm
- Dry weight
- 128.0 kg
- Wet weight
- 139.0 kg
- Fuel capacity
- 13.40 litres
- Ground clearance
- 175 mm
Chassis & suspension
- Frame
- Steel trellis frame, powder coated
- Front suspension
- WP Apex Ø 43 mm
- Rear suspension
- WP Apex Monoshock
- Front wheel travel
- 142 mm
- Rear wheel travel
- 150 mm
- Rake (fork angle)
- 25.0°
- Trail
- 100 mm
Brakes & wheels
- Front brakes
- Single disc. ABS. Four-piston radial fixed calliper
- Front brakes diameter
- 300 mm
- Rear brakes
- Single disc. ABS. Single-piston floating calliper
- Rear brakes diameter
- 230 mm
- ABS
- Yes
- Front tyre
- 110-17
- Rear tyre
- 150-17
Other
- Color options
- Black/orange
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2011 | 2015 | 2019 | 2021 | 2022 | 2026 |
|---|---|---|---|---|---|---|
| Capacity | 125 cc | 125 cc | 125 cc | 125 cc | 125 cc | 125 cc |
| Dry weight | 125 kg | 127 kg | 128 kg | 128 kg | 128 kg | 128 kg |
| Seat height | 810 mm | 800 mm | 830 mm | 830 mm | 830 mm | 800 mm |
| Fuel capacity | 11 L | 11 L | 13.4 L | 13.4 L | 13.4 L | 13.4 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the KTM 125 Duke?
The 2021 KTM 125 Duke has a Capacity of 125.0 ccm (7.63 cubic inches).
What engine power does the KTM 125 Duke have?
The 2021 KTM 125 Duke has a Power of 15.0 HP (10.9 kW).
How many gears does the KTM 125 Duke have?
The 2021 KTM 125 Duke has a Gearbox of 6-speed.
What is the torque of the KTM 125 Duke?
The 2021 KTM 125 Duke has a Torque of 12.0 Nm (1.2 kgf-m or 8.9 ft.lbs) @ 8000 RPM.
How much does the KTM 125 Duke weigh?
The 2021 KTM 125 Duke has a Dry weight of 128.0 kg (282.2 pounds).
Shop this bike
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The 2021 KTM 125 Duke is a sleek and powerful motorcycle that is perfect for riders looking for a lightweight and agile option. This bike features a 125cc engine that delivers impressive performance and acceleration. The compact design and nimble handling make it ideal for navigating through city streets and tight corners with ease. The 2021 KTM 125 Duke also comes equipped with advanced braking and suspension systems for added safety and stability on the road. With its sporty styling and cutting-edge technology, this motorcycle is an excellent choice for riders who want a thrilling and dynamic riding experience.
Overall, the 2021 KTM 125 Duke offers a perfect balance of power, agility, and style. Its lightweight design and impressive performance make it a top choice for riders who crave excitement on the road. Whether you're a new rider or a seasoned enthusiast, this motorcycle is sure to impress with its responsive handling and advanced features. If you're in the market for a versatile and thrilling bike, the 2021 KTM 125 Duke is definitely worth considering for your next adventure.
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