Motocross Bikes
2025KTM 300 SX
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The 2025 KTM 300 SX is a lightweight two-stroke motocrosser designed for intermediate to advanced riders seeking aggressive performance and precision handling. Powered by a 293cc liquid-cooled single-cylinder engine with Keihin EFI and paired with a five-speed transmission, it delivers potent power delivery and exceptional maneuverability. Known for its competitive edge in motocross racing and high-octane trail riding, the 300 SX combines raw speed with fuel efficiency and modern emission standards.
- Capacity
- 293.2 ccm
- Engine
- Single, two-stroke
- Gearbox
- 5-speed
- Dry weight
- 99.4 kg
- Seat height
- 958 mm
- Power
- 29.3 HP (21.6 kW)
What’s new for the 2025 KTM 300 SX
vs the 2024| Spec | 2024 | 2025 |
|---|---|---|
| Front suspension | WP XACT-USD, Ø 48 mm | WP XACT-USD (AER), Ø 48 mm |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- A pure-bred motocross weapon built for racing berms, jumps and rough terrain at full attack on closed circuits.
- Built for
- Featherweight, hard-hitting and razor-sharp - a violent, high-revving two-stroke MX machine that lives to be ridden hard.
- Not ideal for
- Not for commuting, touring, road riding, passengers or anyone wanting a comfortable, easygoing bike. No lights, no plate.
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
- 293.2 ccm
- Power
- 29.3 HP (21.6 kW)
- Engine type
- Single, two-stroke
- Fuel consumption
- 2.80 litres/100 km (35.7 km/l)
- Power/weight ratio
- 0.2948 HP/kg (dry)
- Bore x stroke
- 72.0 x 72.0 mm
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- Vitesco Technologies EMS
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet, DDS multi-disc clutch, Brembo hydraulics
Dimensions & weight
- Wheelbase
- 1493 mm
- Seat height
- 958 mm
- Dry weight
- 99.4 kg
- Fuel capacity
- 7.20 litres
- Ground clearance
- 354 mm
Chassis & suspension
- Frame
- Central double-cradle-type 25CrMo4 steel. Aluminum-reinforced polyamide subframe.
- Front suspension
- WP XACT-USD (AER), 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. Brembo 2-piston floating caliper
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc. Brembo single-piston floating calliper, brake disc
Other
- Color options
- Orange/black/grey
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 | 2023 | 2024 | 2025 | 2026 | 2027 |
|---|---|---|---|---|---|
| Capacity | 293 cc | 293 cc | 293 cc | 293 cc | 293 cc |
| Dry weight | 99 kg | 99 kg | 99 kg | 99 kg | 99 kg |
| Seat height | 958 mm | 958 mm | 958 mm | 958 mm | 958 mm |
| Fuel capacity | 7.2 L | 7.2 L | 7.2 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 300 SX?
The 2025 KTM 300 SX has a Capacity of 293.2 ccm (17.89 cubic inches).
What engine power does the KTM 300 SX have?
The 2025 KTM 300 SX has a Power of 29.3 HP (21.6 kW).
How many gears does the KTM 300 SX have?
The 2025 KTM 300 SX has a Gearbox of 5-speed.
How much does the KTM 300 SX weigh?
The 2025 KTM 300 SX has a Dry weight of 99.4 kg (219.1 pounds).
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