Price: £9,399

FINANCE FROM 9.9 % APR !
  • Bike Type: Motocross
  • Engine Size: 143.99cc
  • Fuel Capacity: 7.2l
  • Model Year: 2025
  • Weight: 92.6 (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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It’s back! After a 2-year absence, the 2025 KTM 150 SX is once again ready to tear into your favourite MX track.

Get ready to experience what it feels like to be a marble launched from a slingshot.

The KTM 150 SX pulls hard from the bottom, gallops in the middle, and sings at the top. Which is where it belongs.

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 150 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

Many parts of the 150 SX engine have been rearranged, modified, or developed from the ground up. With an overall weight of just below 39.6 lb (18 kg), this is a powerhouse bar none. Designed to provide more torque than its stablemate, the KTM 125 SX, it remains true to its nature, without losing its typical high-revving lightweight 2-stroke character.

Selectable Maps

The 2025 KTM 150 SX features a map select switch allowing the racer to switch between 2 engine maps. The White Map – or Map 1 – provides a linear, predictable power delivery ideally suited to attack hard-packed dirt with a leaner air-fuel mixture. Alternatively, the Green Map – Mapping 2 – is tuned for loose, thick sandy conditions with a richer mix.

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