What category is the 2025 KTM 125 SX?

The 2025 KTM 125 SX has a Category of Enduro / offroad.

What is the engine size of the 2025 KTM 125 SX?

The 2025 KTM 125 SX has a Capacity: of 124.8 ccm (7.62 cubic inches).

What type of engine does the 2025 KTM 125 SX have?

The 2025 KTM 125 SX has a Engine type of Single cylinder, two-stroke.

How many gears does the 2025 KTM 125 SX have?

The 2025 KTM 125 SX has a Gearbox of 6-speed.

KTM 125 SX - 2025 Specifications and Reviews

Name: 2025 KTM 125 SX
Brand: KTM

The 2025 KTM 125 SX is a lightweight two-stroke offroad machine designed for young riders and beginners entering competitive motocross. Known for its agile handling and responsive 15 hp engine, it delivers an engaging platform for learning fundamental riding skills. The fuel-injected single-cylinder powerplant provides crisp power delivery and reliability across varying track conditions.

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2025

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General information
Color Options	Orange/black/grey
Category	Enduro / offroad
Model	KTM 125 SX

Engine and Transmission Specifications
Starting	Electric
Clutch	Wet multi-disc DS clutch, Brembo hydraulics
Final Drive	Chain (final drive)
Gearbox	6-speed
Cooling System	Liquid
Ignition	Vitesco Technologies EMS
Induction	Injection. Keihin EFI, throttle body 39 mm
Bore x Stroke	54.0 x 54.5 mm (2.1 x 2.1 inches)
Max Power	15.0 HP (10.9 kW))
Capacity:	124.8 ccm (7.62 cubic inches)

Physical measures and capacities
Fuel Capacity	7.20 litres (1.90 US gallons)
Wheelbase	1493 mm (58.8 inches)
Ground Clearance	359 mm (14.1 inches)
Seat Height	958 mm (37.7 inches) If adjustable, lowest setting.
Power/Weight Ratio	0.1623 HP/kg
Dry Weight	92.4 kg (203.7 pounds)
KTM 125 SX dimensions and frame
Wheels	Spoked wheels with aluminium rims
Rear Brakes	Single disc
Brake Disc Diameter	220 mm (8.7 inches)
Front Brakes	Single disc
Rear Tyre	2.15-19
Front Tyre	1.6-21
Rear Wheel Travel	300 mm (11.8 inches)
Rear Suspension	WP XACT Monoshock with linkage
Front Wheel Travel	310 mm (12.2 inches)
Front Suspension	WP XACT-USD, Ã˜ 48 mm
Frame	Central double-cradle-type 25CrMo4 steel. Aluminum-reinforced polyamide subframe.
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Update specs	Report missing specs or required updates.
Rake (fork angle)	26.1Â°
Exhaust system	Aluminum
Driveline	520, Non-sealed chain
Lubrication system	Wet sump
Engine type	Single cylinder, two-stroke
Model year	2025

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Feet:

At 958mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with cannot reach comfortably on the 2025 KTM 125 SX, with a cramped knee angle of around 85 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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