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The 2025 KTM 50 SX FACTORY EDITION is ready to blast into the highly competitive 50cc class with proper KTM FACTORY RACING credentials. It's undeniably READY TO RACE, built around an advanced steel frame, housing a powerful engine, and boasting leading components such as DUNLOP Geomax MX53 tires, a FMF exhaust system, a 35 mm WP XACT AER fork, a WP XACT monoshock, and a hydraulic Formula brake system. All this, along with key similarities with the full-sized motocross range, superior levels of quality, and revolutionary height adjustability, make it the most serious 50cc motocross bike available on the market.
FROM £4,599.00
Different adjustability options were built into the 2025 KTM 50 SX FACTORY EDITION's construction using scientific statistical data and young racers' input data. Finding the right fit for your little ripper is easy thanks to height-adjustable suspension, handlebar position, subframe, and bodywork, taking the seat height from a low setting of 634mm to a taller setting of 682mm.
There's no more worrying about breaking the plug, thanks to the 2025 KTM 50 SX FACTORY EDITION featuring a Iridium-type spark plug from BRISK with a longer thread and a factory orange spark plug connector. Also, thanks to this innovation from BRISK, the part number is printed on the spark plugs for easy reading.
The 2025 KTM 50 SX FACTORY EDITION is fitted with a automatic centrifugal clutch reducing the complexity for younger riders, and helping to boost riding confidence. The multi-disc clutch delivers a precise and predictable power delivery across the RPM range. It can be set to suit rider preferences or track conditions without using any special tools. Also, a reinforced clutch basket provides Improved durability, wear, and consistent performance. But this being the FACTORY EDITION, it also gets a 'bling' HINSON Racing CNC machined outer clutch cover for added punch.
A proven Dell'Orto type PHBG 19 BS carburetor takes prime position in producing the goods in the 2024 KTM 50 SX FACTORY EDITION, with updated settings that work perfectly in harmony with the new engine, exhaust, and air intake design.
And specific to the KTM 50 SX FACTORY EDITION, the reed valve case features a ''double stage'' concept, with an additional set of membrane flaps for even better gas atomisation.
Right, this is a big one. The 2025 KTM 50 SX FACTORY EDITION boasts a high-strength chromium molybdenum steel frame design with forged connecting parts integrated into the frame. This together with carefully calculated parameters of longitudinal flex and torsional rigidity, allow tailormade stiffness and an unprecedented quality of the Mini frame could be achieved. The frame layout features a typical MX design without any cross tube behind the steering head. Like our full-size models, the rear shock mount is separated from the main upper frame tube. The frame also comes with frame protectors as standard.
Rolling off the race rig and into the pit lane, the 2025 KTM 50 SX FACTORY EDITION uses lightweight, black anodized, aluminum rims like the full-size KTM SX range. These provide the highest levels of strength and reliability; DUNLOP Geomax MX53 tires deliver outstanding performance on any terrain and exceptional straight-line stability.
Featuring the same level of technology offered on the full-size KTM SX range, the 2025 KTM 50 SX FACTORY EDITION is fitted with hydraulic brake calipers and waved, state-of-the-art front and rear brake discs. This system ensures advanced braking feel and unmatched stopping performance in all conditions, specifically on wet or muddy tracks, with improved durability and brake pad longevity.
The 2025 KTM 50 SX FACTORY EDITION features a KTM Red Bull Factory Racing-inspired color scheme, with much of the bodywork finished in orange with blue accents - much like those found on the full-size KTM Factory Editions. Of course, sponsor logos, gray ODI lock-on grips, and an orange factory seat rounds off the package, making this 50cc weapon look as fast as it gets off the line.
ENGINE | |
| Transmission | Single-Speed Automatic |
| Starter | Kickstarter |
| Stroke | 40.7 mm |
| Bore | 39.5 mm |
| Clutch | Centrifugal clutch (adjustable) |
| Displacement | 49.9 cm³ |
| EMS | Seletra 2p D36 |
| Design | 1-cylinder, 2-stroke engine |
CHASSIS | |
| Weight (Without fuel) | 42.5 KG |
| Tank Capacity (Approx.) | 2.3 L |
| Front Brake Disc Diameter | 160 mm |
| Rear Brake Disc Diameter | 160 mm |
| Front Brake | Disc Break |
| Rear Brake | Disc Break |
| Chain | 415, Non-sealed |
| Frame Design | Chrome-molybdenum steel central-tube frame |
| Front Suspension | XACT 35 WP Upside-Down fork, Ø 35 mm |
| Rear Suspension | XACT WP PDS mono shock |
| Ground Clearance | 233 mm |
| Seat Height | 653 mm |
| Suspension Travel (Front) | 200 mm |
| Suspension Travel (Rear) | 190 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.
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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.
| OTR | £15,299.00 |
| Customer Deposit | £3,899.00 |
| Amount of Credit | £11,400.00 |
| 36 Monthly Payments of | £155.10 |
| Optional Final Payment | £8,606.25 |
| Total Amount Payable | £18,088.85 |
| Total Charge for Credit | £2,789.85 |
| APR Representative | 9.40% |
| Duration of Agreement | 37 Months |
| Annual Contracted Mileage | 4,000 |
| Excess Mileage Charge | £0.149 |
| OTR | £15,899.00 |
| Customer Deposit | £3,899.00 |
| Amount of Credit | £12,000.00 |
| 36 Monthly Payments of | £159.81 |
| Optional Final Payment | £9,202.50 |
| Total Amount Payable | £18,854.66 |
| Total Charge for Credit | £2,955.66 |
| APR Representative | 9.40% |
| Duration of Agreement | 37 Months |
| Annual Contracted Mileage | 4,000 |
| Excess Mileage Charge | £0.149 (plus VAT) |
| OTR | £15,599.00 |
| Customer Deposit | £3,899.00 |
| Amount of Credit | £11,700.00 |
| 36 Monthly Payments of | £169.79 |
| Optional Final Payment | £8,392.50 |
| Total Amount Payable | £18,403.94 |
| Total Charge for Credit | £2,804.94 |
| APR Representative | 9.40% |
| Duration of Agreement | 37 Months |
| Annual Contracted Mileage | 4,000 |
| Excess Mileage Charge | £0.149 (plus VAT) |
