Motocross Bikes
2025KTM 150 SX
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The 2025 KTM 150 SX is a lightweight two-stroke motocross bike engineered for competitive junior and amateur riders seeking explosive acceleration and nimble handling. Its fuel-injected 144cc engine delivers sharp power characteristics ideal for technical terrain, while the aluminum chassis and precision Brembo braking system provide confidence-inspiring control. Best known for bridging the gap between smaller displacement classes and larger bikes, it excels in motocross racing and off-road training.
- Capacity
- 144.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 92.6 kg
- Seat height
- 958 mm
- Power
- 11.5 HP (8.5 kW)
What’s new for the 2025 KTM 150 SX
vs the 2024| Spec | 2024 | 2025 |
|---|---|---|
| Front suspension | WP XACT-USD, Ø 48 mm | WP XACT-USD (AER), Ø 48 mm |
Other years
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for motocross and cross-country racing on dirt tracks, not for street or commuting use.
- Built for
- A high-strung, revvy two-stroke that rewards aggressive riding, quick gear changes, and an active body position with sharp, flickable handling.
- Not ideal for
- Not suitable for riders wanting a comfortable, relaxed, road-going or touring motorcycle, or anyone seeking passenger capability or long-distance comfort.
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
- 144.0 ccm
- Power
- 11.5 HP (8.5 kW)
- Engine type
- Single, two-stroke
- Power/weight ratio
- 0.1242 HP/kg (dry)
- Bore x stroke
- 58.0 x 54.5 mm
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- Vitesco Technologies EMS
- Lubrication system
- Mixture oil lubrication 1:40
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Multi-plate clutch, Brembo hydraulics
Dimensions & weight
- Wheelbase
- 1493 mm
- Seat height
- 958 mm
- Dry weight
- 92.6 kg
- Fuel capacity
- 7.20 litres
- Ground clearance
- 359 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. Four-piston calipers.
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc. Two-piston calipers.
- Rear brakes diameter
- 220 mm
- Front tyre
- 80/100-21
- Rear tyre
- 100/90-19
Other
- Color options
- Orange/black/grey
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 | 2009 | 2013 | 2018 | 2022 | 2025 | 2026 |
|---|---|---|---|---|---|---|
| Capacity | 144 cc | 144 cc | 144 cc | 144 cc | 144 cc | 144 cc |
| Dry weight | 91 kg | 91 kg | 87 kg | 88 kg | 93 kg | 93 kg |
| Seat height | 985 mm | 992 mm | 960 mm | 950 mm | 958 mm | 958 mm |
| Fuel capacity | 8 L | 7.5 L | 7 L | 7.5 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 150 SX?
The 2025 KTM 150 SX has a Capacity of 144.0 ccm (8.79 cubic inches).
What engine power does the KTM 150 SX have?
The 2025 KTM 150 SX has a Power of 11.5 HP (8.5 kW).
How many gears does the KTM 150 SX have?
The 2025 KTM 150 SX has a Gearbox of 6-speed.
How much does the KTM 150 SX weigh?
The 2025 KTM 150 SX has a Dry weight of 92.6 kg (204.1 pounds).
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