Motocross Bikes
2021KTM 350 SX-F
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The 2021 KTM 350 SX-F is a lightweight motocross bike engineered for intermediate to advanced riders seeking a nimble, powerful platform. Its 349cc liquid-cooled four-stroke engine delivers strong mid-range performance with excellent maneuverability, making it ideal for technical terrain and competitive racing. Known for responsive handling and aggressive styling, the 350 SX-F bridges the gap between smaller and larger displacement competition bikes.
- Capacity
- 349.7 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 99.5 kg
- Seat height
- 950 mm
- Power
- 50.0 HP (36.8 kW)
What’s new for the 2021 KTM 350 SX-F
vs the 2020| Spec | 2020 | 2021 |
|---|---|---|
| Front suspension | WP-USD, AER 48, Ø 48 mm | WP XACT-USD, Ø 48 mm |
| Rear suspension | WP shock absorber with linkage | WP XACT Monoshock with linkage |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for motocross and off-road competition, excelling at jumps, berms, and technical terrain rather than any road use.
- Built for
- A sharp, high-revving single-cylinder engine paired with a featherweight chassis gives it razor-sharp agility and instant throttle response for aggressive riders.
- Not ideal for
- This is not a fit for commuters, touring riders, passengers, or anyone seeking a comfortable, road-legal, low-maintenance motorcycle.
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 usEngine
- Capacity
- 349.7 ccm
- Power
- 50.0 HP (36.8 kW)
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.5025 HP/kg (dry)
- Bore x stroke
- 88.0 x 57.5 mm
- Compression
- 14.0:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- Keihin EMS
- Lubrication system
- Forced oil lubrication with 2 Eaton pumps
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet multi-disc clutch, Brembo hydraulics
Dimensions & weight
- Wheelbase
- 1489 mm
- Seat height
- 950 mm
- Dry weight
- 99.5 kg
- Fuel capacity
- 7.00 litres
- Ground clearance
- 370 mm
Chassis & suspension
- Frame
- Central double-cradle-type 25CrMo4 steel
- Front suspension
- WP XACT-USD, Ø 48 mm
- Rear suspension
- WP XACT Monoshock with linkage
- Front wheel travel
- 310 mm
- Rear wheel travel
- 300 mm
- Rake (fork angle)
- 26.1°
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 220 mm
- Front tyre
- 80/100-21
- Rear tyre
- 110/90-19
Other
- Color options
- Orange/white/black
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 | 2011 | 2015 | 2019 | 2021 | 2023 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 350 cc | 350 cc | 350 cc | 350 cc | 350 cc | 350 cc |
| Dry weight | 104 kg | 105 kg | 100 kg | 100 kg | 100 kg | 102 kg |
| Seat height | 992 mm | 992 mm | 950 mm | 950 mm | 958 mm | 958 mm |
| Fuel capacity | 7.5 L | 7.5 L | 7 L | 7 L | 7.2 L | 7.2 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 350 SX-F?
The 2021 KTM 350 SX-F has a Capacity of 349.7 ccm (21.34 cubic inches).
What engine power does the KTM 350 SX-F have?
The 2021 KTM 350 SX-F has a Power of 50.0 HP (36.8 kW).
How many gears does the KTM 350 SX-F have?
The 2021 KTM 350 SX-F has a Gearbox of 5-speed.
How much does the KTM 350 SX-F weigh?
The 2021 KTM 350 SX-F has a Dry weight of 99.5 kg (219.4 pounds).
Shop this bike
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The 2021 KTM 350 SX-F is a powerhouse of a motorcycle, delivering exceptional performance and handling for riders of all skill levels. The 350cc engine provides a perfect balance of power and agility, making it ideal for both motocross and off-road trail riding. With a lightweight frame and top-of-the-line suspension, this bike effortlessly tackles any terrain with ease, giving riders the confidence to push their limits.
In addition to its impressive performance, the 2021 KTM 350 SX-F boasts a sleek and aggressive design that is sure to turn heads on the track or trail. The bike's high-quality components and advanced technology make it a top choice for riders looking for a reliable and exciting ride. Whether you're a seasoned rider or just starting out, the 2021 KTM 350 SX-F is a formidable motorcycle that offers unmatched versatility and adrenaline-pumping excitement.
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