KTM 125 SX Introducing the KTM 125 SX READY TO RACE!

KTM 125 SX


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.

WAS £8,649.00

NOW £7,149.00

SAVING £1,500.00


Easy Suspension Adjustment

The 2024 KTM SX range offers tool-free suspension setup on both ends, making it easy for riders to fine-tune their suspension. The shock absorber features hand-adjustable dual compression control for quick high- and low-speed adjustments, while the front forks have a single air pressure preload valve and accessible click adjusters for compression and rebound. An air pump is included.

Electronic Fuel Injection

In the 2-stroke KTM SX range, electronic fuel injection eliminates the need for pre-race jetting setups. Keihin EFI and reed valve case design ensure consistent power delivery regardless of altitude.

EFI & Power Valve

The KTM 125 SX now features electronic fuel injection and a Power Valve, delivering smoother power across the rev range for enhanced traction and holeshot performance.


The KTM 125 SX boasts exceptional power and lightweight construction. For 2024, it sets the benchmark in the competitive 125 cc class with an overall engine weight of just 17.86 kg.

Selectable Maps

The 2024 KTM 125 SX includes a map select switch, offering two engine maps. Map 1 provides ultimate power for dominating hard-pack surfaces, while Map 2 gives an edge in soft, sandy conditions.

Absolute Control

The 2024 KTM bikes provide superior control on any track, with a frame design engineered for both longitudinal rigidity and centralizing rotating mass near the center of gravity. Shock mounting enhances corner traction by improving anti-squat behavior, while inward footpeg placement reduces the risk of snags in deep ruts and when jumping.


The 2024 KTM SX and SX-F models feature an optimized rider triangle that improves knee contact, especially when standing on the pegs. Enhanced grip surfaces and mud-expelling plastics ensure control in wet conditions. A flatter seat profile and high-grip seat cover facilitate exceptional rider mobility. A polyamide reinforced aluminum subframe enhances rider feedback.

Mass Centralization

The 2024 KTM 125 SX engine prioritizes mass centralization, resulting in a lighter, more agile handling experience that outperforms the competition.


Equipped with a 48mm air-type WP XACT front fork featuring a split damping function, it instills confidence for tackling the track. Hydrostops in the fork legs enhance bottoming-out resistance and reduce rebound during jumps and bumps. Redesigned fork protection rings provide enhanced dirt protection and reliability.


The 2024 KTM 125 SX guarantees rock-solid stability at any speed due to a repositioned and forged steering head connection and CNC-milled triple clamps made from high-grade aluminum. These components ensure optimal steering stem stiffness, precise fork tube alignment, and geometry of the fork clamps, resulting in highly responsive and smooth fork action, along with unwavering stability on rough terrain.


StarterElectric Starter 
Stroke54.5 mm 
Bore54 mm 
ClutchWet multi-disc DDS clutch, Brembo hydraulics
Displacement128.8 cm³
EMSVitesco Technologies EMS
Design1-cylinder, 2-stroke engine


Weight (Without fuel)92.4 KG
Tank Capacity (Approx.)7.2L
Front Brake Disc Diameter260 mm
Rear Brake Disc Diameter220 mm
Front BrakeDisc Break
Rear BrakeDisc Break
Chain520, Non-sealed
Frame DesignCentral double-cradle-type 25CrMo4 steel
Front Suspension
WP XACT-USD, Ø 48 mm
Rear SuspensionWP XACT Monoshock with linkage
Ground Clearance359 mm
Seat Height958 mm
Suspension Travel (Front)310 mm
Suspension Travel (Rear)300 mm


With KTM Finance, nothing stands in your way – you can now ride away on your own dream set of wheels. Our range of finance packages gives you the freedom to hop onto your READY TO RACE bike as early as tomorrow, as well as giving you the option to enhance your KTM even more with official KTM PowerParts.

The benefit of using these finance plans is that you can configure them yourself, making them flexible and tailored to you. You choose an installment amount that best fits your lifestyle and budget by adjusting your deposit or term, and you'll be in the seat before you know it. It's easy to customise the monthly amounts to suit your situation.


You enjoy flexibility with a variety of finance plans from KTM Finance. Want a new motorcycle? A few more performance-boosting KTM PowerParts? What about some extra items from the stylish KTM PowerWear range? No problem! With a range of finance plan from KTM, you'll get exactly what you need. It's flexible and personalised. KTM Finance offers you a full package that fulfills your every wish.


  • Customised installment amounts and repayment period.
  • Option to reduce monthly payments by paying a deposit amount that you choose.
  • Simple process.
  • Flexibility: with both Personal Contract Purchase* (PCP) and Hire Purchase (HP) plans, you have various options that include the option to own the bike, exchange for a new one or continue financing it at the end of the agreement.

View Finance OptionsEnquire Now

Finance subject to status. Terms & Conditions apply. At the end of a PCP agreement there are 3 options: (I) Part exchange the vehicle, (ii) Pay the Optional Final Payment / Guaranteed Future Value to own the vehicle or (iii) Return the vehicle. Further charges may be made subject to the condition or mileage of the vehicle. Applicants must be 18 or over. Guarantee may be required. Santander Consumer Finance RH1 1SR.

*PCP available on Road registered models, with a guaranteed future value only.

Strapline Content
Welcome to Lings KTM - Your Premier KTM Dealer in Norwich! Lings KTM, your trusted and official KTM dealer in Norwich, is your gateway to the exhilarating world of KTM motorcycles. With a passion for performance and a commitment to quality, we bring you the very best in KTM's iconic lineup. At Lings KTM, we live and breathe motorcycles. Our dedicated team of experts shares your love for the brand and understands the unique thrill that only a KTM can deliver. We're proud to be an official KTM dealer, offering you the latest models, genuine parts, clothing and accessories, and top-notch service to ensure your riding experience is nothing short of exceptional.