Price: £9,799

FINANCE FROM 9.9 % APR !
  • Bike Type: Motocross
  • Engine Size: 249cc
  • Fuel Capacity: 7.2l
  • Model Year: 2025
  • Weight: 99.4(No Fuel)
  • Seat Height: 958mm
  • Max Power Output:
  • Re-worked frame with updated shock mountings and front triangle, including an improved wall thickness.
  • Improved engine mounts with cut-outs to enhance chassis flex, reduce weight by 300g, maintain stability, and improve cornering.
  • Updated tank shrouds with bi-compound plastics improve radiator airflow and cooling
  • Updated chain glider design for improved mud dissipation.
  • Upgraded suspension settings at both ends in support of the updated frame and rear linkage, improving weight distribution, stiffness, and response.
  • Upgraded rear brake pedal construction for increased stiffness and resistance to bending.
  • New fuel tank roll for improved fitment, reducing frame scrubbing, and enhancing durability.
  • New Dunlop GEOMAX MX34 Motocross tyres as standard.
  • All bikes subject to a £99 Prep Fee
  • Nationwide Delivery Available (Please ask for a quote)
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Think “unbridled 2-stroke performance” and you’ll probably see a KTM 250 SX in your mind’s eye. For good reason too – there isn’t much to compare it to.

The 2025 KTM 250 SX takes that even further with a slew of fresh chassis enhancements, making it even more of a legend and one deserving of the record books.

Electric Start

Selectable Maps

Electronic Fuel Injection

Easy Suspension Adjustment

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 laying down optimal power at any altitude, all of the time

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 reality on the 2025 KTM 250 SX.

Thanks to a 12,8V 2 Ah lithium ion battery is placed under the rider’s seat, a high-quality stator and pickup and super robust design, the only thing you’ll be kicking – is ass.

Updated Suspension Settings

For 2025, the KTM SX and SX-F range has given the WP XACT AER fork and WP XACT rear shock an update.

This means you’ll be lining up at the starting gate with re-tuned settings, reduced weight, improved weight distribution, and an increase in overall response.

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 laying down optimal power at any altitude, all of the time.

Performance

The KTM 250 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 2025, The KTM 250 SX enters the race paddock with an overall engine weight of only 52.6 lb (23.9 kg), setting the 250 SX engine as the benchmark in the highly competitive 250 cc class.

Selectable Maps

The 2025 KTM 250 SX features a map select switch allowing the racer to switch between 2 engine maps. Map 1 provides a linear, predictable power delivery, while Map 2 gives it the full beans with crisp, explosive power output.

The illustrated vehicles may vary in selected details from the production models and some illustrations feature optional equipment available at additional cost. All information concerning the scope of supply, appearance, services, dimensions and weights is non-binding and specified with the proviso that errors, for instance in printing, setting and/or typing, may occur; such information is subject to change without notice. Please note that model specifications may vary from country to country. In the case of coated surfaces, there may be color differences due to the usual process fluctuations. The consumption values stated refer to the roadworthy series condition of the vehicles at the time of factory delivery.

All bikes subject to a £99 Prep Fee
Finance available please ask for a bespoke quote