What category is the 2019 KTM 125 SX?

The 2019 KTM 125 SX has a Category of Cross / motocross.

What is the engine size of the 2019 KTM 125 SX?

The 2019 KTM 125 SX has a Capacity: of 124.8 ccm (7.62 cubic inches).

What type of engine does the 2019 KTM 125 SX have?

The 2019 KTM 125 SX has a Engine type of Single cylinder, two-stroke.

Is the 2019 KTM 125 SX air cooled or liquid cooled?

The 2019 KTM 125 SX has a Cooling system of Liquid.

How many gears does the 2019 KTM 125 SX have?

The 2019 KTM 125 SX has a Gearbox of 6-speed.

How much does the 2019 KTM 125 SX weigh?

The 2019 KTM 125 SX has a Dry weight of 87.5 kg (192.9 pounds).

What is the seat height of the 2019 KTM 125 SX?

The 2019 KTM 125 SX has a Seat height of 950 mm (37.4 inches) If adjustable, lowest setting..

KTM 125 SX - 2019 Specifications and Reviews

The 2019 KTM 125 SX is a lightweight two-stroke motocross bike engineered for young and junior riders seeking competitive performance. Known for its aggressive styling, nimble handling, and responsive power delivery, it excels in amateur racing and recreational off-road riding. WP suspension and precision CNC components ensure precise control across varied terrain.

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2019

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General information
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Category	Cross / motocross
Year	2019
Model	KTM 125 SX
Engine and Transmission Specifications
Driveline	13:50. Primary drive: 23:73.
Clutch	Wet multi-disc clutch, hydraulically actuated
Transmission type	Chain (final drive)
Gearbox	6-speed
Cooling system	Liquid
Ignition	Kokusan EMS
Fuel system	Carburettor. Mikuni TMX
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:	124.8 ccm (7.62 cubic inches)

Brakes, suspension, Frame and wheels
Wheels	CNC machined hubs. Excel rims. Wire spoked.
Rear brakes	Single disc. Brake calipers on floating bearings
Diameter	260 mm (10.2 inches)
Front brakes	Single disc. Brake calipers on floating bearings
Rear wheel travel	300 mm (11.8 inches)
Rear Suspension	WP shock absorber with linkage
Front wheel travel	310 mm (12.2 inches)
Front Suspension	WP-USD, AER 48, Ã˜ 48 mm
Rake (fork angle)	26.1°
Frame type	Chrome-molybdenum steel central-tube frame

Physical measures and capacities
Fuel capacity	7.50 litres (1.98 US gallons)
Wheelbase	1485 mm (58.5 inches)
Ground clearance	375 mm (14.8 inches)
Seat height	950 mm (37.4 inches) If adjustable, lowest setting.
Dry weight	87.5 kg (192.9 pounds)
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Starter	Kick
Color options	Orange/white/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

2019 KTM 125 SX Rider Ergonomics Assessment

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Feet:

At 950mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2019 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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Rider Reviews

Total comments: 1

MotorcycleDB Review

The 2019 KTM 125 SX is a top-tier motocross bike that offers a winning combination of power, agility, and durability. This lightweight and nimble machine is perfect for riders looking to dominate the track with its advanced 2-stroke engine and race-ready suspension. The sleek and eye-catching design is complemented by top-of-the-line components, making it a standout choice for both amateur and professional riders. Overall, the 2019 KTM 125 SX is a fantastic choice for motocross enthusiasts who are seeking a high-performance and reliable bike. With its impressive power, precise handling, and top-notch construction, it's no wonder this model has become a favorite among riders who demand the best from their machines. Whether you're hitting the trails or competing on the track, the 2019 KTM 125 SX is sure to deliver an unbeatable riding experience.