Sportbikes
2021KTM RC 390
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The 2021 KTM RC 390 is a fully faired single-cylinder sport bike, popular with new riders and for track days. Its liquid-cooled 373.2cc four-stroke single makes 44 hp and 35 Nm through a six-speed gearbox and chain, with ABS standard. An 820 mm seat, 149 kg dry weight and 9.5-litre tank keep it light and agile.
- Capacity
- 373.2 ccm
- Engine
- Single, four-stroke
- Gearbox
- 6-speed
- Dry weight
- 149.0 kg
- Seat height
- 820 mm
- Power
- 44.0 HP (32.1 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built primarily for spirited cornering, track days, and sharp urban riding rather than long-distance comfort.
- Built for
- A nimble, high-revving single-cylinder sport machine that rewards aggressive throttle and brake inputs with eager, flickable handling.
- Not ideal for
- Not a good fit for riders seeking plush long-haul comfort, pillion-friendly touring, or any serious off-road capability.
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
- 373.2 ccm
- Power
- 44.0 HP (32.1 kW)
- CO2 Emissions
- 100 CO2 g/km
- EPA Certificate No.
- MKTXC.373BAL-010
- EPA Est. Fuel Consumption
- 4.27 L/100km (55.1 US mpg)
- EPA CO Emissions
- 0.6 CO g/km
- Torque
- 35.0 Nm (3.6 kgf-m)
- Engine type
- Single, four-stroke
- Fuel consumption
- 3.50 litres/100 km (28.6 km/l)
- Power/weight ratio
- 0.2953 HP/kg (dry)
- Bore x stroke
- 89.0 x 60.0 mm
- Compression
- 14.5:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- Bosch EMS with RBW
- Aspiration
- Naturally aspirated
- Valves per cylinder
- 4
- Lubrication system
- Semi-dry sump
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- PASC™ antihopping clutch, mechanically operated
Dimensions & weight
- Wheelbase
- 1340 mm
- Seat height
- 820 mm
- Dry weight
- 149.0 kg
- Fuel capacity
- 9.50 litres
- Ground clearance
- 179 mm
Chassis & suspension
- Frame
- Steel trellis frame, powder coated
- Front suspension
- WP upside-down Ø 43 mm
- Rear suspension
- WP Monoshock
- Front wheel travel
- 125 mm
- Rear wheel travel
- 150 mm
- Rake (fork angle)
- 23.5°
Brakes & wheels
- Front brakes
- Single disc. ABS. Four-piston calipers.
- Front brakes diameter
- 320 mm
- Rear brakes
- Single disc. ABS. Floating disc. Single-piston caliper.
- Rear brakes diameter
- 230 mm
- ABS
- Yes
- Front tyre
- 95/75-R17
- Rear tyre
- 115/75-R17
Other
- Color options
- Black/white/orange
Specs last verified against published sources: .
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 | 2019 | 2021 | 2022 | 2024 |
|---|---|---|---|---|---|---|
| Capacity | 373 cc | 373 cc | 373 cc | 373 cc | 373 cc | 373 cc |
| Dry weight | 147 kg | 147 kg | 147 kg | 149 kg | 155 kg | 155 kg |
| Seat height | 820 mm | 820 mm | 820 mm | 820 mm | 824 mm | 824 mm |
| Fuel capacity | 10 L | 10 L | 10 L | 9.5 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 390?
The 2021 KTM RC 390 has a Capacity of 373.2 ccm (22.77 cubic inches).
What engine power does the KTM RC 390 have?
The 2021 KTM RC 390 has a Power of 44.0 HP (32.1 kW).
How many gears does the KTM RC 390 have?
The 2021 KTM RC 390 has a Gearbox of 6-speed.
What is the torque of the KTM RC 390?
The 2021 KTM RC 390 has a Torque of 35.0 Nm (3.6 kgf-m or 25.8 ft.lbs).
How much does the KTM RC 390 weigh?
The 2021 KTM RC 390 has a Dry weight of 149.0 kg (328.5 pounds).
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