What category is the 2027 KTM 450 SX F?

The 2027 KTM 450 SX F has a Category of Cross / motocross.

What is the engine size of the 2027 KTM 450 SX F?

The 2027 KTM 450 SX F has a Capacity: of 449.9 ccm (27.45 cubic inches).

How many gears does the 2027 KTM 450 SX F have?

The 2027 KTM 450 SX F has a Gearbox of 5-speed.

KTM 450 SX F - 2027 Specifications and Reviews

Name: 2027 KTM 450 SX F
Brand: KTM

The KTM 450 SX-F carries into 2027 as KTM's flagship 450 motocross racer, powered by a 449.9cc single-cylinder engine producing a claimed 63 hp through a 5-speed gearbox, Brembo-actuated wet clutch, and chain final drive. A chromoly steel frame with an aluminium-reinforced subframe, WP XACT air fork, and WP XACT monoshock keep weight to a claimed 102.6 kg dry, with a 958mm seat height built for an aggressive, standing riding style. It remains a pure competition machine aimed at motocross racing rather than street or trail use.

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General information
Color Options	Orange/white/grey
Category	Cross / motocross
Model	KTM 450 SX F

Engine and Transmission Specifications
Starting	Electric
Clutch	Wet, DDS multi-disc clutch, Brembo hydraulics
Final Drive	Chain (final drive)
Gearbox	5-speed
Cooling System	Liquid
Ignition	Keihin EMS
Fuel Control	Single Overhead Cams (SOHC)
Induction	Injection. Keihin EFI, throttle body 44 mm
Bore x Stroke	95.0 x 63.4 mm (3.7 x 2.5 inches)
Compression Ratio	13.0:1
Engine Type	Single cylinder, four-stroke
Capacity:	449.9 ccm (27.45 cubic inches)

Physical measures and capacities
Fuel Capacity	7.20 litres (1.90 US gallons)
Wheelbase	1493 mm (58.8 inches)
Ground Clearance	343 mm (13.5 inches)
Seat Height	958 mm (37.7 inches) If adjustable, lowest setting.
Power/Weight Ratio	0.6140 HP/kg
Dry Weight	102.6 kg (226.2 pounds)
KTM 450 SX F dimensions and frame
Wheels	Spoked wheels with aluminium rims
Rear Brakes	Single disc. Brake calipers on floating bearings
Brake Disc Diameter	220 mm (8.7 inches)
Front Brakes	Single disc. Brake calipers on floating bearings
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 (AER), 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.
Comments	Connectivity.
Electrical	Lightweight 495 g 2Ah lithium-ion starter battery
Rake (fork angle)	26.1Â°
Driveline	520, Non-sealed chain
Output	63.0 HP (46.0 kW))
Year of manufacture	2025

Performance Profile & Rider Fit

63 hp

Peak Power

Best For

Track85%

City10%

Cornering90%

Daily Riding10%

Touring5%

Passenger5%

Rider Profile

Best For	This is a pure competition machine best suited to experienced off-road or motocross riders comfortable with a tall seat, aggressive power delivery, and no electronic comfort aids.
Purpose	Built exclusively for motocross racing and serious off-road riding, not for street use or commuting.
Rider Fit	Demands a fit, confident rider due to its tall 958mm seat height, minimal weight at just over 100kg dry, and race-tuned suspension that rewards active body positioning.
Character	A razor-sharp, high-revving single-cylinder racer that feels explosive and light, prioritizing agility and acceleration out of corners over outright top speed or stability.
Not Ideal For	Not suitable for new riders, daily commuting, passengers, or anyone seeking comfort, storage, or long-distance touring capability.

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

Rider Fit Visualizer

2027 KTM 450 SX F Rider Ergonomics Assessment

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Feet:

At 958mm, a rider of 175cm with a 79cm (estimated) inseam will not reach the ground comfortably on the 2027 KTM 450 SX F, 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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