KTM 300 SX '26

Description

KTM 300 SX 2026: Power-to-weight ratio that rewrites the rules of motocross

The KTM 300 SX ’26 remains the benchmark for big-displacement 2-stroke motorcycles, offering a power-to-weight ratio that is hard to match in the motocross world. The model is designed for riders who pursue pure performance, real speed and total control on the track, and the modifications inspired by the KTM Factory Racing team raise the technical and functional level of the bike.

The suspension remains a key element for competition, allowing quick adjustments without tools, both front and rear. The rear shock absorber system features dual compression adjustment, through which the rider can change the high and low speed settings in a matter of seconds. The result is a high level of adaptability in corners, aggressive sections and big jumps.

Up front, the 48 mm WP XACT AER forks use a sealed air chamber and a separate pressurized oil chamber for progressive damping and constant stability. The oil and air bypass reduces pressure peaks, providing optimal ground contact and excellent feedback. Adjustments are accessible via manual clickers and the pre-load air valve managed with the pump included in the kit, making it easy to set up the bike right on the track.

KTM frame optimized for flexibility and stability: the shock absorber mounting area has been redesigned to reduce unwanted stiffness, and the engine mounts have been restructured for a more precise response to load. The bike responds better to changes in direction, absorbs shocks effectively and creates confidence when the speed increases.

The KTM 300 SX is built for podium-oriented riders, offering brute force, instant throttle response and agility for continuous attack on the track. This model is aimed at those who want a purebred motocross, with technical resources straight from the professional world.

Technical features:
Engine

Engine type: 1 cylinder, 2 stroke

Displacement: 293.2 cc

Gearbox: 5-speed

Power supply: KEIHIN EFI, 39 mm throttle

EMS: Vitesco Technologies

Clutch: DDS multi-disc in oil bath, Brembo hydraulic actuation

Primary drive ratio: 26:72

Frame: 25CrMo4 double swingarm steel

Rear subframe: aluminum reinforced polyamide

Front brakes: disc

Rear brakes: disc

Chain: 520 non-sealed

Suspension

Front fork: WP XACT-USD AER, Ø 48 mm

Rear shock absorber: WP XACT with rocker arm and links

Front suspension travel: 310 mm

Rear suspension travel: 300 mm

Front adjustments: high/low speed compression and rebound

Rear adjustments: compression and rebound

Dimensions and weight

Seat height: 958 mm

Ground clearance: 354 mm

Tank capacity: 7.2 liters

Weight without fuel: 99.4 kg.