KTM 350 SX F - 2026 Specifications and Reviews

The 2025 KTM 350 SX-F is a mid-size motocross bike designed for intermediate to advanced riders seeking a versatile machine. Powered by a 349.7cc liquid-cooled four-stroke single with fuel injection, it delivers responsive power and excellent handling characteristics. Known for its lightweight construction and competitive performance, it excels in both recreational and amateur racing environments.

2026
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General information

Color OptionsOrange/black/grey
CategoryCross / motocross
 
 

Engine and Transmission Specifications

StartingElectric
ClutchWet multi-disc clutch, Brembo hydraulics
Final DriveChain (final drive)
Gearbox5-speed
Cooling SystemLiquid
IgnitionKeihin EMS
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
InductionInjection. Keihin EFI, throttle body 44 mm
Bore x Stroke88.0 x 57.5 mm (3.5 x 2.3 inches)
Capacity:349.7 ccm (21.34 cubic inches)

Physical measures and capacities

Fuel Capacity7.20 litres (1.90 US gallons)
Wheelbase1493 mm (58.8 inches)
Ground Clearance343 mm (13.5 inches)
Seat Height958 mm (37.7 inches) If adjustable, lowest setting.
Dry Weight101.9 kg (224.7 pounds)

KTM 350 SX F dimensions and frame

WheelsSpoked wheels with aluminium rims
Rear BrakesSingle disc
Brake Disc Diameter220 mm (8.7 inches)
Front BrakesSingle disc
Rear Tyre2.15-19
Front Tyre1.6-21
Rear Wheel Travel300 mm (11.8 inches)
Rear SuspensionWP XACT Monoshock with linkage
Front Wheel Travel310 mm (12.2 inches)
Front SuspensionWP XACT-USD (AER), Ø 48 mm
FrameCentral double-cradle-type 25CrMo4 steel. Aluminum-reinforced polyamide subframe.
 
 

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Update specsReport missing specs or required updates.
CommentsConnectivity.
Electrical2Ah Lithium battery.
Rake (fork angle)26.1°
Exhaust systemAluminum
Driveline520, Non-sealed chain
Engine typeSingle cylinder, four-stroke
Model year2025
Motorcycle nameKTM 350 SX-F

Performance Profile & Rider Fit

Best For

Track90%
City15%
Cornering85%
Daily Riding15%
Touring15%
Passenger5%

Rider Profile

Best ForThis is a competition-focused motocross machine best suited to intermediate through expert off-road riders, not beginners.
PurposeBuilt purely for motocross track and off-road competition, where its light weight and high-strung single-cylinder engine deliver rapid acceleration and razor-sharp handling over jumps and rough terrain.
Rider FitWith a tall 958mm seat height, firm suspension, and aggressive ergonomics, it demands a fit, physically capable rider comfortable standing and shifting body weight actively.
CharacterIt rewards an aggressive, committed riding style with explosive throttle response, precise cornering, and confidence-inspiring stability at speed over rough ground.
Not Ideal ForIt is not suited to riders wanting a comfortable commuter, a passenger-friendly bike, or long-distance road touring capability.

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

Rider Fit Visualizer

2026 KTM 350 SX F Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 958mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2026 KTM 350 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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