KTM 150 SX - 2011 Specifications and Reviews

The 2011 KTM 150 SX is a lightweight two-stroke enduro bike designed for young riders and beginners seeking an agile off-road machine. Its 143cc single-cylinder engine delivers nimble handling and easy power delivery, making it ideal for learning fundamental dirt biking skills. Known for its responsive performance and compact frame, this model excels in tight terrain and technical trails.

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General information

CategoryEnduro / offroad
Year2011
ModelKTM 150 SX

Engine and Transmission Specifications

Exhaust systemAluminium
Driveline14:50. Primary drive: 23:73.
ClutchWet mDouble disk clutch, operated hydraulically
Transmission type,final driveChain
Gearbox6-speed
Cooling systemLiquid
Lubrication systemMixture oil lubrication 1:40
IgnitionKokusan
Fuel systemCarburettor. Keihin PWK 38S AG
Bore x stroke56.0 x 58.4 mm (2.2 x 2.3 inches)
Engine typeSingle cylinder, two-stroke
Capacity:143.60 ccm (8.76 cubic inches)
 
 

Brakes, suspension, Frame and wheels

Wheels1,60 x 21in., 2,15 x 19in. Excel
Rear brakes diameter220 mm (8.7 inches)
Rear brakesSingle disc
Front brakes diameter260 mm (10.2 inches)
Front brakesSingle disc
Rear tyre dimensions100/90-19
Front tyre dimensions80/100-21
Rear suspension travel185 mm (7.3 inches)
Rear suspensionWP PDS shock absorber
Front suspension travel185 mm (7.3 inches)
Front suspensionWP USD 48 mm (1.89 in)
Rake (fork angle)26.5°
Frame typeCental double-cradle-type 25CrMo4. Subframe: Aluminium.

Physical measures and capacities

Fuel capacity7.50 litres (1.98 gallons)
Wheelbase1,480 mm (58.3 inches)
Ground clearance385 mm (15.2 inches)
Seat height992 mm (39.1 inches) If adjustable, lowest setting.
Dry weight88.8 kg (195.8 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Color optionsOrange/black/white
StarterKick

Performance Profile & Rider Fit

Best For

Track90%
City5%
Cornering88%
Daily Riding5%
Touring5%
Passenger0%

Rider Profile

Best ForBest suited to intermediate-to-advanced off-road riders, as a small-bore two-stroke motocross machine demands active riding and precise clutch and throttle control to stay in its power band.
PurposeBuilt purely for motocross and cross-country racing on dirt tracks, not for street or commuting use.
Rider FitIts ultra-light dry weight and tall seat height favor smaller or lighter riders who can still comfortably manage the high seat and aggressive riding stance.
CharacterA high-strung, revvy two-stroke that rewards aggressive riding, quick gear changes, and an active body position with sharp, flickable handling.
Not Ideal ForNot suitable for riders wanting a comfortable, relaxed, road-going or touring motorcycle, or anyone seeking passenger capability or long-distance comfort.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2011 KTM 150 SX Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 992mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2011 KTM 150 SX, with a moderate knee angle of around 90 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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