What category is the 2015 KTM 125 SX?

The 2015 KTM 125 SX has a Category of Cross / motocross.

What is the engine size of the 2015 KTM 125 SX?

The 2015 KTM 125 SX has a Capacity: of 124.80 ccm (7.62 cubic inches).

What type of engine does the 2015 KTM 125 SX have?

The 2015 KTM 125 SX has a Engine type of Single cylinder, two-stroke.

Is the 2015 KTM 125 SX air cooled or liquid cooled?

The 2015 KTM 125 SX has a Cooling system of Liquid.

How many gears does the 2015 KTM 125 SX have?

The 2015 KTM 125 SX has a Gearbox of 6-speed.

How much does the 2015 KTM 125 SX weigh?

The 2015 KTM 125 SX has a Dry weight of 90.8 kg (200.2 pounds).

What is the seat height of the 2015 KTM 125 SX?

The 2015 KTM 125 SX has a Seat height of 992 mm (39.1 inches) If adjustable, lowest setting..

KTM 125 SX - 2015 Specifications and Reviews

Name: 2015 KTM 125 SX
Brand: KTM

The 2015 KTM 125 SX is a lightweight two-stroke motocross bike designed for junior and amateur riders seeking an affordable entry into competitive off-road racing. Known for its nimble handling, responsive power delivery, and proven WP suspension, it delivers the authentic KTM dirt bike experience in an accessible package. Its compact dimensions and manageable weight make it ideal for developing fundamental riding skills on the track.

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2015

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General information
Category	Cross / motocross
Year	2015
Model	KTM 125 SX
Engine and Transmission Specifications
Driveline	13:50. Primary drive: 23:73.
Clutch	Wet multi-disc clutch, hydraulically operated
Transmission type,final drive	Chain
Gearbox	6-speed
Cooling system	Liquid
Ignition	Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment, type Kokusan
Fuel system	Carburettor
Bore x Stroke	54.0 x 54.5 mm (2.1 x 2.1 inches)
Engine details	Reed intake.
Engine type	Single cylinder, two-stroke
Capacity:	124.80 ccm (7.62 cubic inches)
Brakes, suspension, Frame and wheels
Rear brakes diameter	220 mm (8.7 inches)
Rear brakes	Single disc. Brake calipers on floating bearings
Front brakes diameter	260 mm (10.2 inches)
Front brakes	Single disc. Brake calipers on floating bearings
Rear wheel travel	317 mm (12.5 inches)
Rear Suspension	WP Suspension 5018 BAVP DCC
Front wheel travel	300 mm (11.8 inches)
Front Suspension	WP Suspension Up Side Down 4860 MXMA CC
Rake (fork angle)	26.5°
Frame type	Central tube frame made of chrome molybdenum steel tubing

Physical measures and capacities
Fuel capacity	7.50 litres (1.98 gallons)
Wheelbase	1,480 mm (58.3 inches)
Ground clearance	395 mm (15.6 inches)
Seat height	992 mm (39.1 inches) If adjustable, lowest setting.
Dry weight	90.8 kg (200.2 pounds)
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Starter	Kick
Color options	Orange/black

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

2015 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 2015 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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