Sportbikes
2021KTM RC 125
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The 2021 KTM RC 125 is a learner-legal sports bike styled after KTM's bigger RC models. Its liquid-cooled 125cc single makes 15 hp and 12 Nm through a six-speed gearbox, with ABS. An 824 mm seat, 147 kg dry weight and a 13.7-litre tank make it a sharp first sports bike.
- Capacity
- 125.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 6-speed
- Dry weight
- 147.0 kg
- Seat height
- 824 mm
- Power
- 15.0 HP (10.9 kW)
What’s new for the 2021 KTM RC 125
vs the 2020| Spec | 2020 | 2021 |
|---|---|---|
| Dry weight | 139.0 kg (306.4 pounds) | 147.0 kg (324.1 pounds) |
| Fuel capacity | 9.50 litres (2.51 US gallons) | 13.70 litres (3.62 US gallons) |
| Front suspension | WP upside-down Ø 43 mm | WP APEX 43 |
| Rear suspension | WP monoshock | WP APEX - Monoshock |
| Front brakes | Single disc. ABS. Four-piston calipers. | Single disc. ABS. Four-piston radial fixed calliper. |
| Rear brakes | Single disc. ABS. Floating disc. Single-piston caliper. | Single disc. ABS. Single-piston floating calliper. |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- A pint-sized sport machine for spirited canyon carving, commuting and track-day schooling, teaching real sportbike technique on low power.
- Built for
- Energetic, revvy and razor-sharp; a proper baby superbike that rewards momentum and precise lines rather than brute power.
- Not ideal for
- Not for riders wanting highway speed, two-up touring, long-distance comfort or any off-road use.
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)
- Engine type
- Single, four-stroke
- Fuel consumption
- 2.40 litres/100 km (41.7 km/l)
- Power/weight ratio
- 0.1020 HP/kg (dry)
- Bore x stroke
- 58.0 x 47.2 mm
- Compression
- 14.5:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- Bosch EMS
- 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
- 1340 mm
- Seat height
- 824 mm
- Dry weight
- 147.0 kg
- Fuel capacity
- 13.70 litres
- Ground clearance
- 158 mm
Chassis & suspension
- Frame
- Steel trellis frame, powder coated
- Front suspension
- WP APEX 43
- Rear suspension
- WP APEX - Monoshock
- Front wheel travel
- 120 mm
- Rear wheel travel
- 150 mm
- Rake (fork angle)
- 23.5°
Brakes & wheels
- Front brakes
- Single disc. ABS. Four-piston radial fixed calliper.
- Front brakes diameter
- 320 mm
- Rear brakes
- Single disc. ABS. Single-piston floating calliper.
- Rear brakes diameter
- 230 mm
- ABS
- Yes
- Front tyre
- 110/90-R17
- Rear tyre
- 150/70-R17
Other
- Color options
- White/Orange, 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 | 2014 | 2017 | 2020 | 2021 | 2023 | 2026 |
|---|---|---|---|---|---|---|
| Capacity | 125 cc | 125 cc | 125 cc | 125 cc | 125 cc | 125 cc |
| Dry weight | 135 kg | 135 kg | 139 kg | 147 kg | 147 kg | 147 kg |
| Seat height | 820 mm | 820 mm | 820 mm | 824 mm | 824 mm | 824 mm |
| Fuel capacity | 10 L | 10 L | 9.5 L | 13.7 L | 13.7 L | 13.7 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 RC 125?
The 2021 KTM RC 125 has a Capacity of 125.0 ccm (7.63 cubic inches).
What engine power does the KTM RC 125 have?
The 2021 KTM RC 125 has a Power of 15.0 HP (10.9 kW).
How many gears does the KTM RC 125 have?
The 2021 KTM RC 125 has a Gearbox of 6-speed.
What is the torque of the KTM RC 125?
The 2021 KTM RC 125 has a Torque of 12.0 Nm (1.2 kgf-m or 8.9 ft.lbs).
How much does the KTM RC 125 weigh?
The 2021 KTM RC 125 has a Dry weight of 147.0 kg (324.1 pounds).
Shop this bike
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