Motocross Bikes
2017KTM 150 SX
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The 2017 KTM 150 SX is a lightweight, nimble 144cc two-stroke motocross bike engineered for young riders and smaller-framed competitors seeking sharp handling and explosive power delivery. Its compact dimensions, minimal 87.2 kg weight, and responsive WP suspension deliver precise control across varied terrain. Best known for its competitive-ready performance and accessibility in the junior racing category, it balances aggressive geometry with learner-friendly ergonomics.
- Capacity
- 143.9 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 87.2 kg
- Seat height
- 960 mm
- Power
- 11.5 HP (8.5 kW)
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
- 143.9 ccm
- Power
- 11.5 HP (8.5 kW)
- Engine type
- Single, two-stroke
- Power/weight ratio
- 0.1319 HP/kg (dry)
- Bore x stroke
- 58.0 x 54.5 mm
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- Kokusan 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
- 1485 mm
- Seat height
- 960 mm
- Dry weight
- 87.2 kg
- Fuel capacity
- 7.00 litres
- Ground clearance
- 375 mm
Chassis & suspension
- Frame
- Central tube frame made of chrome molybdenum steel tubing
- Front suspension
- WP-USD, AER 48, Ø 48 mm
- Rear suspension
- WP shock absorber 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/white/black
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 | 2017 | 2018 | 2022 | 2026 |
|---|---|---|---|---|---|---|
| Capacity | 144 cc | 144 cc | 144 cc | 144 cc | 144 cc | 144 cc |
| Dry weight | 91 kg | 91 kg | 87 kg | 87 kg | 88 kg | 93 kg |
| Seat height | 985 mm | 992 mm | 960 mm | 960 mm | 950 mm | 958 mm |
| Fuel capacity | 8 L | 7.5 L | 7 L | 7 L | 7.5 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 2017 KTM 150 SX has a Capacity of 143.9 ccm (8.78 cubic inches).
What engine power does the KTM 150 SX have?
The 2017 KTM 150 SX has a Power of 11.5 HP (8.5 kW).
How many gears does the KTM 150 SX have?
The 2017 KTM 150 SX has a Gearbox of 6-speed.
How much does the KTM 150 SX weigh?
The 2017 KTM 150 SX has a Dry weight of 87.2 kg (192.2 pounds).
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