SMOKE THE COMPETITION

2024 KTM 125 SX

2024 KTM 125 SX

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All it takes is one hard, fast rip into a loamy berm to know that the 2024 KTM 125 SX is a serious contender in the 125 cc race. Not only has the 'Ring-ting-ting' been given a fuel-injected revival, but the entire motorcycle also benefits from class-leading developments at every end. Boasting accolades such as being the leader in 2-stroke motocross innovation in the modern era, the 2024 KTM 125 SX simply slays the rest of the 125 cc class. All you need do is prod the starter, blip the throttle and let rip.
All it takes is one hard, fast rip into a loamy berm to know that the 2024 KTM 125 SX is a serious contender in the 125 cc race. Not only has the 'Ring-ting-ting' been given a fuel-injected revival, but the entire motorcycle also benefits from class-leading developments at every end. Boasting accolades such as being the leader in 2-stroke motocross innovation in the modern era, the 2024 KTM 125 SX simply slays the rest of the 125 cc class. All you need do is prod the starter, blip the throttle and let rip.
  1. Before The Gate
  2. Start Strong
  3. Calm Under Fire
  4. Hit The Big Stuff
  5. Maintaining Momentum
Before The Gate

01. Before The Gate

Before The Gate
CLICK INTO ACTION
CLICK INTO ACTION

Easy Suspension Adjustment

Get dialed in! The 2024 KTM SX range boasts totally tool-free suspension setup at both ends. Thanks to the shock absorber design featuring hand-adjustable dual compression control, it allows riders to adjust high- and low-speed settings in a matter of seconds. On the front end, the forks are also easily adjusted thanks to a single air pressure preload valve, as well as through easy access click adjusters for compression and rebound. We'll even throw the air pump in as standard.
CLICK INTO ACTION
Before The Gate
NO JETS - ONLY ROCKET SHIPS
NO JETS - ONLY ROCKET SHIPS

Electronic Fuel Injection

Pre-mix gets a remix across the 2-stroke KTM SX range, with electronic fuel injection setting the standard. Now there's no more fiddly jetting setup pre-race, And thanks to the Keihin EFI and reed valve case design, you can be guaranteed of ...
NO JETS - ONLY ROCKET SHIPS
Before The Gate
CHUGGA CHUGGA, RING DING DING!
CHUGGA CHUGGA, RING DING DING!

Electric Start

Picture this; You're 7 laps into an absolute ripper of a race. You miss your line and end up stalling in a deep rut. But you don't sweat it. All you do is press the starter button and you blast off again to take the final flag. This is the r ...
CHUGGA CHUGGA, RING DING DING!
Start Strong

02. Start Strong

Start Strong
SMOOTHER POWER DELIVERY
SMOOTHER POWER DELIVERY

EFI + Power Valve

With EFI comes great rideability. Along with the electronic fuel injection, a Power Valve has also been fitted to the KTM 125 SX, allowing for more usable power throughout the rev range. Smoother power means better traction. Better traction ...
SMOOTHER POWER DELIVERY
Start Strong
UNMATCHED PERFORMANCE
UNMATCHED PERFORMANCE

Performance

The KTM 125 SX has always represented the very best of unsurpassed power and lightweight construction. The simplicity and low maintenance cost of the 2-stroke motor have made it a favorite amongst motocross riders for generations. For 2024, ...
UNMATCHED PERFORMANCE
Start Strong
PICK YOUR POWER
PICK YOUR POWER

Selectable Maps

The 2024 KTM 125 SX features a map select switch allowing the racer to switch between 2 engine maps. Map 1 provides the ultimate power delivery to dominate hard-pack surfaces, while Map 2 gives you the edge in soft, sandy conditions.
PICK YOUR POWER
Calm Under Fire

03. Calm Under Fire

Calm Under Fire
SLEEKER FOR YOU TO SCRUB CLEANER
SLEEKER FOR YOU TO SCRUB CLEANER

Absolute Control

No matter how gnarly the track is, you'll stay in complete control thanks to the frame design that has not only been engineered for longitudinal rigidity but also repositions rotating mass closer to the center of gravity. The shock mounting ...
SLEEKER FOR YOU TO SCRUB CLEANER
Calm Under Fire
FLUID RIDER MOTION
FLUID RIDER MOTION

Ergonomics

The 2024 KTM SX and SX-F range feature a rider triangle, providing improved knee contact - especially when standing on the pegs - with improved gripping surfaces all around. The plastics work to expel mud buildup in wet, muddy conditions, wi ...
FLUID RIDER MOTION
Calm Under Fire
HARNESSING GRAVITY
HARNESSING GRAVITY

Mass Centralization

With a major emphasis placed on mass centralization, the 2024 KTM 125 SX engine is designed to centralize rotating mass for optimal operation with the chassis. This results in a lighter, more agile handling feel that simply runs rings around ...
HARNESSING GRAVITY
Hit The Big Stuff

04. Hit The Big Stuff

Hit The Big Stuff
GRIP AND LET RIP
GRIP AND LET RIP

Traction

Ready to rip your arms out of the sockets? Together with the benefits of mass centralization and overall reduced weight, the anti-squat behavior of the chassis is significantly improved by changing the backbone of the steel frame concept. In ...
GRIP AND LET RIP
Hit The Big Stuff
UNFLAPPABLE FRONT END
UNFLAPPABLE FRONT END

WP XACT Fork

48mm air type WP XACT front fork with a split damping function provides all the confidence you need to attack the track. Hydrostops in the fork legs improves bottoming-out resistance and account for less rebound when attacking big jumps, bum ...
UNFLAPPABLE FRONT END
Hit The Big Stuff
RACING ON RAILS
RACING ON RAILS

Stability

The 2024 KTM 125 SX is rock-solid at any speed thanks to a repositioned and forged steering head connection and CNC milled triple clamps. Made from high-grade aluminum, these feature optimally tuned steering stem stiffness, perfect alignment ...
RACING ON RAILS
Maintaining Momentum

05. Maintaining Momentum

Maintaining Momentum
UNOBTRUSIVE IMPACT
UNOBTRUSIVE IMPACT

Energy absorption

Besides the expertly crafted, hydro-formed, laser-cut, and robot-welded frame being engineered to provide exceptional rider feedback and straight-line stability, it consists of specifically calculated parameters of longitudinal and torsional ...
UNOBTRUSIVE IMPACT
Maintaining Momentum
NOTHING TO HOLD YOU BACK
NOTHING TO HOLD YOU BACK

Ground clearance

No one enjoys a bad hook-up. Luckily, the frame and shock absorber geometry on the 2024 KTM 125 SX improve ground clearance of the linkage, with topology optimized die-cast footpegs that are less susceptible to hooking on deep ruts, and take ...
NOTHING TO HOLD YOU BACK
Maintaining Momentum
PRECISE, LAP AFTER LAP
PRECISE, LAP AFTER LAP

Consistency

A WP XACT shock absorber provides unmatched consistency lap after lap, thanks to low-friction SKF linkage seals and advanced damping characteristics for unsurpassed traction and energy absorption.
PRECISE, LAP AFTER LAP

Technical Details

Engine

  • Transmission 6-speed
  • Starter Electric starter
  • Stroke 54.5 mm
  • Bore 54 mm
  • Clutch Wet multi-disc DS clutch, Brembo hydraulics
  • Displacement 124.8 cm³
  • EMS Vitesco Technologies EMS
  • Design 1-cylinder, 2-stroke engine
  • Fuel-mixture generation Keihin EFI, throttle body 39 mm

Chassis

  • Weight (without fuel) 92.4 kg
  • Tank capacity (approx.) 7.2 l
  • Wheelbase 1493 mm
  • Front brake disc diameter 260 mm
  • Rear brake disc diameter 220 mm
  • Front brake Disc brake
  • Rear brake Disc brake
  • Chain 520, Non-sealed
  • Frame design Central double-cradle-type 25CrMo4 steel
  • Front suspension WP XACT-USD, Ø 48 mm
  • Ground clearance 359 mm
  • Handlebar Neken, aluminium Ø 28/22 mm
  • Rear suspension WP XACT Monoshock with linkage
  • Seat height 958 mm
  • Silencer Aluminium
  • Steering head angle 63.9 °
  • Rear subframe design Aluminum-reinforced polyamide
  • Suspension travel (front) 310 mm
  • Suspension travel (rear) 300 mm
  • Wheels Spoked wheels with aluminium rims