What category is the 2021 KTM 450 SX-F Factory?

The 2021 KTM 450 SX-F Factory has a Category of Cross / motocross.

What is the engine size of the 2021 KTM 450 SX-F Factory?

The 2021 KTM 450 SX-F Factory has a Capacity: of 449.3 ccm (27.42 cubic inches).

What type of engine does the 2021 KTM 450 SX-F Factory have?

The 2021 KTM 450 SX-F Factory has a Engine type of Single cylinder, four-stroke.

What is the engine power of the 2021 KTM 450 SX-F Factory?

The 2021 KTM 450 SX-F Factory has a Power of 63.0 HP (46.0 kW).

Is the 2021 KTM 450 SX-F Factory air cooled or liquid cooled?

The 2021 KTM 450 SX-F Factory has a Cooling system of Liquid.

How many gears does the 2021 KTM 450 SX-F Factory have?

The 2021 KTM 450 SX-F Factory has a Gearbox of 4-speed.

How much does the 2021 KTM 450 SX-F Factory weigh?

The 2021 KTM 450 SX-F Factory has a Dry weight of 100.5 kg (221.6 pounds).

What is the seat height of the 2021 KTM 450 SX-F Factory?

The 2021 KTM 450 SX-F Factory has a Seat height of 950 mm (37.4 inches) If adjustable, lowest setting..

KTM 450 SX-F Factory - 2021 Specifications and Reviews

Name: 2021 KTM 450 SX-F Factory
Brand: KTM

The 2021 KTM 450 SX-F Factory is a high-performance motocross machine built for competitive riders and serious enthusiasts seeking championship-level performance. Its potent 449cc liquid-cooled four-stroke engine delivers 63 horsepower with sharp throttle response and reliable power delivery across the RPM range. Known for exceptional handling, precision engineering, and Factory-spec components, it excels in professional racing and demanding off-road conditions.

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2021

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General information
Category	Cross / motocross
Year	2021
Model	KTM 450 SX-F Factory

Engine and Transmission Specifications
Exhaust system	AkrapoviÄ Slip-On silencer
Driveline	5/8 x 1/4
Clutch	Wet, DDS multi-disc clutch, Brembo hydraulics
Transmission type	Chain (final drive)
Gearbox	4-speed
Cooling system	Liquid
Ignition	Keihin EMS
Fuel control	Single Overhead Cams (SOHC)
Fuel system	Injection
Bore x Stroke	95.0 x 63.4 mm (3.7 x 2.5 inches)
Power	63.0 HP (46.0 kW)
Engine type	Single cylinder, four-stroke
Capacity:	449.3 ccm (27.42 cubic inches)
Brakes, suspension, Frame and wheels
Seat	Factory seat with Selle Dalla Valle logo
Wheels	KTM Factory wheels. 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 XACT Monoshock with linkage
Front wheel travel	310 mm (12.2 inches)
Front Suspension	WP XACT-USD, Ã˜ 48 mm
Rake (fork angle)	26.1°
Frame type	25CrMo4 steel central-tube
Physical measures and capacities
Fuel capacity	7.00 litres (1.85 US gallons)
Wheelbase	1485 mm (58.5 inches)
Ground clearance	370 mm (14.6 inches)
Seat height	950 mm (37.4 inches) If adjustable, lowest setting.
Power/weight ratio	0.6269 HP/kg
Dry weight	100.5 kg (221.6 pounds)

Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Comments	Connectivity to a myKTM app
Electrical	Lightweight 495 g lithium-ion starter battery
Starter	Electric
Color options	Orange/white/black

Performance Profile & Rider Fit

Best For

Track10%

City5%

Cornering20%

Daily Riding5%

Touring5%

Passenger0%

Rider Profile

Best For	Note: the specifications provided are for a KTM 50 SX children's minibike, not the KTM 450 SX-F Factory motocross machine named in the request, so this profile reflects the 50 SX data only.
Purpose	This is a purpose-built first motorcycle for young children learning to ride off-road, not a performance or touring machine.
Rider Fit	Designed for very small, light riders aged roughly 4 to 10, with a low seat height and minimal weight for easy handling by beginners.
Character	A simple, forgiving automatic-clutch two-stroke minibike meant to teach balance, throttle control, and basic off-road riding skills.
Not Ideal For	This bike is not suitable for adult riders, highway use, touring, or anyone seeking speed or long-distance comfort.

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

Rider Fit Visualizer

2021 KTM 450 SX-F Factory 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 2021 KTM 450 SX-F Factory, 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

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MotorcycleDB Review

The 2021 KTM 450 SX-F Factory is a powerhouse of a motorcycle that offers top-of-the-line performance and cutting-edge technology. With its powerful 450cc engine, lightweight frame, and advanced suspension system, this bike is designed to dominate the track. The Factory edition also comes equipped with premium components such as a carbon fiber subframe, reworked cylinder head, and a high-end WP XACT suspension system, providing riders with ultimate control and precision. Whether you're a seasoned racer or a weekend warrior, the 2021 KTM 450 SX-F Factory delivers a thrilling riding experience that is sure to excite any motocross enthusiast. Overall, the 2021 KTM 450 SX-F Factory is a top-tier motorcycle that offers unparalleled performance and cutting-edge technology. With its powerful engine, lightweight construction, and premium components, this bike is designed to dominate the motocross track. Whether you're a competitive racer or simply enjoy hitting the trails on the weekends, the 2021 KTM 450 SX-F Factory is a top choice for riders who demand the best.