Dirt Bikes

2026 KTM 450 SX-F Technical Overview

Features and specifications of KTM’s standard-model 450cc motocross bike for 2026.

Updated: December 31, 2025

The current-generation KTM 450 SX-F began in 2023 with an all-new platform first seen on the 450 SX-F Factory Edition the year prior. The Austrian manufacturer’s standard-model 450cc motocross bike also enjoyed a mid-generation update in 2025 that included a reworked double-cradle chromoly steel frame, revised shock linkage, tweaked suspension settings, and more.

Changes for 2026 are minimal compared to last year with a new radiator cap, CPC fuel connector protection cap, and graphics. After weighing and dynoing the 450 SX-F, we snapped photos of it at the track—statics for this technical overview and actions for our 2026 450 Motocross Shootout. The latter is in the works, and the former is right here for your reading and viewing enjoyment.

In its fourth year of the current model generation, KTM’s 450 SX-F features some minor mechanical and cosmetic revisions for 2026.Jeff Allen

Its fuel-injected liquid-cooled SOHC four-stroke 450cc single-cylinder engine pumps out 56.7 hp and 34.5 lb.-ft. of torque on our in-house rear-wheel dyno.Jeff Allen

KTM is one of four brands to employ a Twin Air air filter in its standard-model 450cc motocross bike—the others being Husqvarna, GasGas, and Triumph.Jeff Allen

While sister brand Husqvarna has experimented with different hydraulic clutches in the past, KTM has stuck with Brembo from year to year.Jeff Allen

Sharing the same electronics package as Husqvarna’s FC 450, the 450 SX-F boasts two engine maps, traction control, launch control, and quickshift. On the right side of its Neken handlebar are engine start and stop buttons combined on a single module.Jeff Allen

KTM’s standard-model 450cc motocross bike is in year 2 of its latest-generation double-cradle chromoly steel frame, which features cutouts near the top shock mount and head stays.Jeff Allen

Swingarm is identical for 2026, but KTM changed it slightly last year to improve chain slider durability.Jeff Allen

The only brands to spec air forks on their respective standard-model 450cc motocross bikes in 2026 are KTM, Husqvarna, and GasGas with a WP Xact AER 48mm fork. Rear suspension is common among them as well in the form of a WP Xact shock.Jeff Allen

KTM lets you know functions of each button on the left side of the handlebar as well as stock fork settings with these two informative stickers.Jeff Allen

Last year was KTM’s first spec’ing its entire full-size motocross bike range with Dunlop Geomax MX34 tires.Jeff Allen

Brembo brakes are a staple on KTM’s full-size motocross bikes, which consist of a dual-piston front caliper paired with a 260mm disc and single-piston rear caliper that bites onto a 220mm disc.Jeff Allen

Radiator shrouds were new last year, and are more minimalistic in appearance than those on 2023 and 2024 models.Jeff Allen

Keeping weight down is always a focus of KTM’s, and its 2026 450 SX-F is one of the lightest in class at 240 pounds wet on the Dirt Rider automotive scales.Jeff Allen

2026 KTM 450 SX-F Specs

MSRP:	$11,649
Engine:	SOHC, liquid-cooled, 4-stroke single-cylinder; 4 valves
Displacement:	450cc
Bore x Stroke:	95.0 x 63.4mm
Compression Ratio:	13.1:1
Transmission/Final Drive:	5-speed/chain
Dirt Rider Measured Horsepower:	56.7 hp @ 9400 rpm
Dirt Rider Measured Torque:	34.5 lb.-ft. @ 7700 rpm
Fuel System:	EFI w/ 44mm throttle body
Clutch:	Wet, multiplate Damped Diaphragm Steel (DDS); hydraulic actuation
Frame:	Central double-cradle chromoly steel
Front Suspension:	WP Xact AER 48mm fork, air pressure, compression damping, and rebound damping adjustable; 12.2 in. travel
Rear Suspension:	WP Xact shock, spring preload, high/low-speed compression damping, and rebound damping adjustable; 11.8 in. travel
Front Brake:	Brembo 2-piston caliper, 260mm disc
Rear Brake:	Brembo 1-piston caliper, 220mm disc
Tires, Front/Rear:	Dunlop Geomax MX34; 80/100-21 / 120/80-19
Rake/Trail:	26.1°/NA
Wheelbase:	58.8 in.
Ground Clearance:	13.5 in.
Dirt Rider Measured Seat Height:	37.6 in.
Fuel Capacity:	1.9 gal.
Dirt Rider Measured Wet Weight:	240 lb.
Availability:	Now
Contact:	ktm.com