Motocross Bikes

2012KTM 150 SX

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The 2012 KTM 150 SX is a lightweight two-stroke enduro machine designed for young riders and those seeking nimble off-road performance. Its 144cc single-cylinder engine delivers sharp power delivery and easy maneuverability, making it ideal for trail riding and competitive motocross. Known for its robust chrome-molybdenum frame and responsive handling, this model excels in technical terrain and tight sections.

Capacity: 143.6 ccm
Engine: Single, two-stroke
Gearbox: 6-speed
Dry weight: 91.6 kg
Seat height: 992 mm
Power: 11.5 HP (8.5 kW)

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What’s new for the 2012 KTM 150 SX

vs the 2011

Spec	2011	2012
Dry weight	88.8 kg (195.8 pounds)	91.6 kg (201.9 pounds)
Front suspension	WP USD 48 mm (1.89 in)	WP Suspension Up Side Down 4860 MXMA CC
Rear suspension	WP PDS shock absorber	WP Suspension 5018 BAVP DCC

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

Off-road & trail92%

Cornering88%

City riding5%

Daily riding5%

Touring5%

Two-up0%

Track90%

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?

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Your height

Inseam (optional)

Units

At 992mm, a rider of 175cm with a 79cm (estimated) inseam will not reach the ground comfortably on the 2012 KTM 150 SX, with a moderate knee angle of around 90 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at over 900 mm — Sky High →

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Full specifications

Engine

Capacity: 143.6 ccm
Power: 11.5 HP (8.5 kW)
Engine type: Single, two-stroke
Power/weight ratio: 0.1255 HP/kg (dry)
Bore x stroke: 56.0 x 58.4 mm
Cooling system: Liquid
Fuel system: Carburettor
Starting: Kick
Ignition: Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment, type Kokusan
Lubrication system: Mixture oil lubrication 1:40

Transmission

Gearbox: 6-speed
Transmission type: Manual
Final drive: Chain
Clutch: Wet mDouble disk clutch / hydraulically operated

Dimensions & weight

Wheelbase: 1480 mm
Seat height: 992 mm
Dry weight: 91.6 kg
Fuel capacity: 7.50 litres
Ground clearance: 395 mm

Chassis & suspension

Frame: Central tube frame made of chrome molybdenum steel tubing
Front suspension: WP Suspension Up Side Down 4860 MXMA CC
Rear suspension: WP Suspension 5018 BAVP DCC
Front wheel travel: 300 mm
Rear wheel travel: 330 mm
Rake (fork angle): 26.5°

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: 100/90-19

Other

Color options: Orange/black/white

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	2012	2013	2018	2022	2026
Capacity	144 cc	144 cc	144 cc	144 cc	144 cc	144 cc
Dry weight	91 kg	92 kg	91 kg	87 kg	88 kg	93 kg
Seat height	985 mm	992 mm	992 mm	960 mm	950 mm	958 mm
Fuel capacity	8 L	7.5 L	7.5 L	7 L	7.5 L	7.2 L