Bikes 23 Jun 2020

Detailed: 2021 KTM SX-F and SX range

Meet the most technically-advanced 'Ready To Race' models to date.

KTM has taken the covers off its 2021 motocross range, featuring enhancements that have flowed through from research and development of the Austrian brand’s factory racing teams that make for the most technically-advanced ‘Ready To Race’ models to date.

Image: Supplied.

The feedback collected by racing achievements globally helped KTM R&D update the KTM SX for 2021 with clear core objectives, to create the lightest, best-handling, most powerful, usable and well-equipped bikes available.

For 2021, improvements across the full-size range focus on suspension and chassis modifications, tweaks to engine architecture to further enhance durability, new Dunlop SX tires and a reworked graphics aesthetic.

The WP XACT front forks feature a redesign of the internals including a new mid-valve damping system for improved control and feedback, an increase to the air bypass slot on the air-leg to enhance initial comfort and a new oil bypass in the outer damping-leg tube to reduce pressure peaks.

The fully-adjustable WP XACT rear shock features new settings for improved pressure balance and to compliment the updates to the front forks. Both ends have been reconfigured to increase confidence and comfort across a wider spread of surfaces. Dunlop’s Geomax MX-33 is the rubber of choice for the KTM SX models thanks to its versatility and race proven performance.

As the flagship model in the four-stroke range, the KTM 450 SX-F benefits from new mapping as well as modifications to the piston, crankshaft, engine casing, rocker arms and shift locker to further refine the bike’s excellent performance and durability, to further shave weight from this already incredibly-light machine. The new mapping provides increased bottom-end power and enhances the performance of Map 2, making it the clear choice for an aggressive engine character.

In addition, the 2021 KTM 450 SX-F together with the new KTM 350 SX-F and KTM 250 SX-F machines can connect with the advanced myKTM app using an extra Connectivity Unit kit – available in the KTM PowerParts catalog.

With the bar pad-integrated Connectivity Unit fitted and the myKTM app installed, riders can personalize their KTM SX-F according to their preferences and track conditions without technical assistance. Offering the finest technical touch, the myKTM app allows for a wide spectrum of adjustability on the fly, a privilege that was limited to elite KTM factory riders until recently.

As a towering example of excellent power-to-weight ratio in the KTM two-stroke range, the 2021 KTM 125 SX features a fresh piston and new clutch internals for increased performance and durability, with the treatment extending to the 250cc-challenging KTM 150 SX.

KTM treats its Sportminicycle roster with the same ground-up priority for development as the full-sized bikes. As a result, the KTM 85 SX, KTM 65 SX, KTM 50 SX and KTM 50 SX Mini can now count on a new throttle assembly for better and smoother throttle action. For the KTM 85 SX, braking potential is much higher thanks to a larger rear disc and a completely new front and rear brake system made by Formula.

All three junior motocrossers now have a tapered handlebar allowing fitment of ODI lock-on grips. For the KTM 50 SX and KTM 50 SX Mini, the new tapered handlebar allows fitment of thinner grips for a confidence-inspiring hold by smaller hands.

First introduced to beginner riders and young racers alike in 2020, the innovative, electrically powered KTM SX-E 5 with adjustable height and power returns in 2021 with new WP XACT front fork tubes that shave 240 grams of weight off the remarkably light chassis, providing that much more confidence and performance for young riders.

The 2021 KTM SX range will become available this summer at all authorized KTM dealers. For further information, visit