What category is the 2021 KTM 250 SX?

The 2021 KTM 250 SX has a Category of Cross / motocross.

What is the engine size of the 2021 KTM 250 SX?

The 2021 KTM 250 SX has a Capacity: of 249.0 ccm (15.19 cubic inches).

What type of engine does the 2021 KTM 250 SX have?

The 2021 KTM 250 SX has a Engine type of Single cylinder, two-stroke.

Is the 2021 KTM 250 SX air cooled or liquid cooled?

The 2021 KTM 250 SX has a Cooling system of Liquid.

How many gears does the 2021 KTM 250 SX have?

The 2021 KTM 250 SX has a Gearbox of 5-speed.

How much does the 2021 KTM 250 SX weigh?

The 2021 KTM 250 SX has a Dry weight of 87.5 kg (192.9 pounds).

What is the seat height of the 2021 KTM 250 SX?

The 2021 KTM 250 SX has a Seat height of 850 mm (33.5 inches) If adjustable, lowest setting..

KTM 250 SX - 2021 Specifications and Reviews

Name: 2021 KTM 250 SX
Brand: KTM

The 2021 KTM 250 SX is a lightweight two-stroke motocross bike designed for intermediate to advanced riders seeking competitive performance. Known for its aggressive power delivery and nimble handling characteristics, it excels in tight track sections and technical terrain. The liquid-cooled 249cc engine and robust steel frame make it a reliable choice for both weekend racers and serious competitors.

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General information
Category	Cross / motocross
Year	2021
Model	KTM 250 SX
Engine and Transmission Specifications
Driveline	13:48. Primary drive: 26:72. 520 X-ring chain.
Clutch	Wet, DDS multi-disc clutch, Brembo hydraulics
Transmission type	Chain (final drive)
Gearbox	5-speed
Cooling system	Liquid
Ignition	Kokusan EMS.
Fuel system	Carburettor. Mikuni TMX.
Bore x Stroke	66.4 x 72.0 mm (2.6 x 2.8 inches)
Engine details	Reed intake
Engine type	Single cylinder, two-stroke
Capacity:	249.0 ccm (15.19 cubic inches)

Brakes, suspension, Frame and wheels
Wheels	CNC machined hubs. Excel rims. Wire spoked. Dunlop Geomax MX 3S tires.
Rear brakes	Single disc
Diameter	260 mm (10.2 inches)
Front brakes	Single disc
Rear tire	110/90-19
Front tire	80/100-21
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
Rake (fork angle)	26.5°
Frame type	Chrome-molybdenum steel central-tube

Physical measures and capacities
Fuel capacity	7.50 litres (1.98 US gallons)
Wheelbase	1495 mm (58.9 inches)
Ground clearance	375 mm (14.8 inches)
Seat height	850 mm (33.5 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

Track85%

City5%

Cornering90%

Daily Riding5%

Touring8%

Passenger0%

Rider Profile

Best For	This is a full-blooded competition motocrosser best suited to experienced or intermediate off-road riders comfortable with a peaky 2-stroke powerband.
Purpose	Built purely for motocross track riding and racing, not for street use or general transportation.
Rider Fit	The tall 958 mm seat height, aggressive ergonomics, and physical demands of a light 2-stroke race bike require good rider fitness and reasonable inseam length.
Character	Sharp, explosive, and razor-agile, this bike rewards aggressive riding and precise throttle control with rapid acceleration bursts and flickable handling.
Not Ideal For	This is not suitable for commuting, touring, carrying passengers, or riders seeking a comfortable, low-maintenance everyday motorcycle.

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

Rider Fit Visualizer

2021 KTM 250 SX Rider Ergonomics Assessment

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Feet:

At 850mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with tip-toe one foot on the 2021 KTM 250 SX, with a cramped knee angle of around 75 degrees and a slightly forward 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 2021 KTM 250 SX is a powerful and agile motocross bike that delivers top-notch performance on the track. With its lightweight chassis and powerful 2-stroke engine, this bike offers impressive acceleration and handling. The updated suspension and frame design provide excellent stability and control, making it an ideal choice for riders looking to push their limits. Overall, the 2021 KTM 250 SX is a fantastic motocross bike that delivers on both power and precision. Its impressive performance and handling make it a top contender in the 250cc class. Whether you're a seasoned racer or a weekend warrior, this bike is sure to impress with its speed, agility, and durability. With its sleek design and top-notch performance, the 2021 KTM 250 SX is a standout choice for motocross enthusiasts.