KTM 125 SX - 2024 Specifications and Reviews

The 2024 KTM 125 SX is a lightweight two-stroke enduro bike designed for young riders and beginners entering competitive off-road racing. Known for its nimble handling, responsive 15 HP engine, and proven reliability, it excels in technical terrain and serves as an ideal stepping stone in motocross progression. Its liquid-cooled single-cylinder design and modern fuel injection deliver consistent performance across varied conditions.

Not Rated stars Average rating: Not Rated from 0 votes
.

General information

CategoryEnduro / offroad
Model year2024
Motorcycle nameKTM 125 SX

Engine and Transmission Specifications

Driveline520, Non-sealed chain
ClutchWet multi-disc DS clutch, Brembo hydraulics
Transmission typeChain (final drive)
Gearbox6-speed
Cooling systemLiquid
Lubrication systemWet sump
IgnitionVitesco Technologies EMS
Fuel systemInjection. EFI
Bore x stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Power output15.0 HP (10.9 kW))
Engine typeSingle cylinder, two-stroke
Capacity:124.8 ccm (7.62 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakesSingle disc
Diameter260 mm (10.2 inches)
Front brakesSingle disc
Rear tire2.15-19
Front tire1.6-21
Rear wheel travel300 mm (11.8 inches)
Rear suspensionWP XACT Monoshock with linkage
Front wheel travel310 mm (12.2 inches)
Front suspensionWP XACT-USD, Ø 48 mm
Rake (fork angle)26.1°
Frame typeCentral double-cradle-type 25CrMo4 steel
 
 

Physical measures and capacities

Fuel capacity7.20 litres (1.90 US gallons)
Ground clearance359 mm (14.1 inches)
Seat height958 mm (37.7 inches) If adjustable, lowest setting.
Power/weight ratio0.1623 HP/kg
Dry weight92.4 kg (203.7 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
StarterElectric
Color optionsWhite/orange/grey/purple

Performance Profile & Rider Fit

Best For

Track95%
City10%
Cornering90%
Daily Riding10%
Touring8%
Passenger5%

Rider Profile

Best ForThis is a full-on motocross competition bike best suited to intermediate through expert off-road riders, not beginners or casual road riders.
PurposeBuilt purely for closed-course motocross racing, it excels at jumps, berms, and rapid direction changes on dirt tracks rather than any street use.
Rider FitThe tall 958 mm seat height, aggressive ergonomics, and demanding 2-stroke power delivery require good rider fitness, strength, and prior dirt bike experience.
CharacterLight, explosive, and razor-sharp in handling, it rewards aggressive riding with a peaky two-stroke power band and minimal weight to manage.
Not Ideal ForIt is not suitable for commuting, highway travel, passengers, or riders seeking comfort, storage, or a forgiving low-end power delivery.

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

Rider Fit Visualizer

2024 Kawasaki KTM 125 SX 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 2024 Kawasaki KTM 125 SX, with a cramped knee angle of around 85 degrees and an upright riding position.

Data quality: estimated (wheelbase estimated from this category's typical bike, not this model's own spec). 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.

Find bikes that fit your height →

Rider Reviews

Add a Comment


Please Login or Register if you would like to leave a comment.