What category is the 2011 KTM 125 SX?

The 2011 KTM 125 SX has a Category of Enduro / offroad.

What is the engine size of the 2011 KTM 125 SX?

The 2011 KTM 125 SX has a Capacity: of 124.80 ccm (7.62 cubic inches).

What type of engine does the 2011 KTM 125 SX have?

The 2011 KTM 125 SX has a Engine type of Single cylinder, two-stroke.

Is the 2011 KTM 125 SX air cooled or liquid cooled?

The 2011 KTM 125 SX has a Cooling system of Liquid.

How many gears does the 2011 KTM 125 SX have?

The 2011 KTM 125 SX has a Gearbox of 6-speed.

How much does the 2011 KTM 125 SX weigh?

The 2011 KTM 125 SX has a Dry weight of 88.8 kg (195.8 pounds).

What is the seat height of the 2011 KTM 125 SX?

The 2011 KTM 125 SX has a Seat height of 992 mm (39.1 inches) If adjustable, lowest setting..

KTM 125 SX - 2011 Specifications and Reviews

Name: 2011 KTM 125 SX
Brand: KTM

The 2011 KTM 125 SX is a lightweight two-stroke enduro bike designed for young riders and beginners entering competitive offroad racing. Its 125cc liquid-cooled single-cylinder engine delivers sharp, responsive power characteristics ideal for learning fundamental motocross skills on varied terrain. Known for exceptional agility and ease of handling, this model established KTM's reputation for producing nimble, race-focused small-displacement machines.

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2011

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General information
Category	Enduro / offroad
Year	2011
Model	KTM 125 SX

Engine and Transmission Specifications
Exhaust system	Aluminium
Driveline	13:50. Primary drive: 23:73.
Clutch	Wet mDouble disk clutch, operated hydraulically
Transmission type,final drive	Chain
Gearbox	6-speed
Cooling system	Liquid
Lubrication system	Mixture oil lubrication 1:40
Ignition	Kokusan
Fuel system	Carburettor. Keihin PWK 38S AG
Bore x stroke	54.0 x 54.5 mm (2.1 x 2.1 inches)
Engine type	Single cylinder, two-stroke
Capacity:	124.80 ccm (7.62 cubic inches)
Brakes, suspension, Frame and wheels
Wheels	1.60 x 21in., 2.15 x 19in. Excel
Rear brakes diameter	220 mm (8.7 inches)
Rear brakes	Single disc
Front brakes diameter	260 mm (10.2 inches)
Front brakes	Single disc
Rear tyre dimensions	100/90-19
Front tyre dimensions	80/100-21
Rear suspension travel	185 mm (7.3 inches)
Rear suspension	WP PDS shock absorber
Front suspension travel	185 mm (7.3 inches)
Front suspension	WP USD 48 mm (1.89 in)
Rake (fork angle)	26.5°
Frame type	Central double-cradle-type 25CrMo4. Subframe: Aluminium.

Physical measures and capacities
Fuel capacity	7.50 litres (1.98 gallons)
Wheelbase	1,480 mm (58.3 inches)
Ground clearance	385 mm (15.2 inches)
Seat height	992 mm (39.1 inches) If adjustable, lowest setting.
Dry weight	88.8 kg (195.8 pounds)
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Color options	Orange/black/white
Starter	Kick

Performance Profile & Rider Fit

Best For

Track95%

City10%

Cornering90%

Daily Riding10%

Touring8%

Passenger5%

Rider Profile

Best For	This is a full-on motocross competition bike best suited to intermediate through expert off-road riders, not beginners or casual road riders.
Purpose	Built purely for closed-course motocross racing, it excels at jumps, berms, and rapid direction changes on dirt tracks rather than any street use.
Rider Fit	The tall 958 mm seat height, aggressive ergonomics, and demanding 2-stroke power delivery require good rider fitness, strength, and prior dirt bike experience.
Character	Light, explosive, and razor-sharp in handling, it rewards aggressive riding with a peaky two-stroke power band and minimal weight to manage.
Not Ideal For	It is not suitable for commuting, highway travel, passengers, or riders seeking comfort, storage, or a forgiving low-end power delivery.

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

Rider Fit Visualizer

2011 KTM 125 SX Rider Ergonomics Assessment

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Feet:

At 992mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2011 KTM 125 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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