Your Favorite KTM MX Bikes Receive A Shot In The Arm For 2025

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Summary

  • Updated frame, suspension, and underpinnings provide improvements & weight savings make up the changes.
  • KTM 150 SX reintroduced after two years with enhanced components.
  • The 2025 KTM SX series offers a fresh design, full-orange bodywork, available from May onwards.



When KTM gets to designing off-roading machines, you better watch out. The brand does not joke around. And if you thought the SX and SX-F ranges were formidable enough, get ready for some exciting news. The KTM SX and SX-F lineups are being updated for 2025. These bikes focus on addressing the niggles while also improving performance, composure, and comfort. Oh, and a fan favorite rejoins the stable for 2025.

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A More Flexible Latest-Gen Chassis

Frame Type: Central Double-Cradle-Type 25CrMo4 Steel

2025 KTM 250 SX
KTM 

The biggest update the 2025 SX and SX-F ranges get is in the frame department. According to some riders, the previous-gen SX and SX-F (along with the EXC range) motorcycles were too stiff and heavier around the headstock. Fortunately, KTM has considered this feedback, fixing it with an updated frame for next year.


The new frame has a reworked front triangle, stock mounts, and wall thickness, all of which promise to improve control and comfort. According to KTM, the new updates improve chassis flex while maintaining stability and improving cornering behavior. This frame is also lighter by 0.66 pounds and pairs with an updated swingarm that has a machined chain slider.

Ready To Race Underpinnings Get Better

2025 KTM 250 SX-F
KTM

Apart from the frame, the 2025 range also gets other updates. Here, the suspension comes with the biggest improvement. The rear WP XACT shock gets an updated linkage with new seals and smaller diameter linkage bolts, which, according to KTM, comes directly from the brand’s Factory MX team. The setup is said to aid weight savings and stiffness, and to complement this, the front WP XACT AER fork has reworked settings for more flex.


Other Improvements To The Range

  • New tank shrouds with bi-composite plastics that improve cooling and add visual flair
  • Updated fuel tank roll to protect the frame against wear while improving fitment
  • Air inlet sleeve is now a one-piece part and manufactured using stiffer materials
  • New exhaust that improves midrange torque and overall performance
  • New Dunlop Geomax MX34 motocross tires that last 30% longer and feature Progressive Cornering Block Technology
  • New Connectivity Unit Offroad as a PowerParts option along with a compatible front fender

Welcome Back Old Friend, KTM 150 SX


The KTM 150 SX has been off the shelves for two years, and it was sorely missed. Fortunately, KTM is bringing it back for 2025. This 150-class motocross bike features a lightweight chassis — now improved — and a punchy two-stroke engine with a ton of improvements. The new 150 SX features overhauled components that enhance performance with better torque delivery and improved riding experience.

Specifications

Engine Type

2-stroke, single-cylinder

Displacement

143.99cc

Frame

Central double-cradle-type, 25CrMo4 steel

Transmission

Six-speed

Clutch

Wet multi-disc DS clutch, Brembo hydraulics

EMS

Vitesco Technologies EMS

Weight

204 LBS

Tank Capacity

1.90 gallons

Front Suspension

WP XACT-USD AER, 48mm, with 12.20 in travel

Rear Suspension

WP XACT Monoshock with linkage, with 11.81 in travel

Ground Clearance

14.13 in

Seat Height

37.71 in


(Specs sourced from KTM)

2025 KTM SX And SX-F Pricing And Availability

2025 KTM 450 SX-F
KTM 

For 2025, the SX series looks fresh with new design, graphics, and full-orange bodywork. We’re excited to get our hands on these motocross machines, and you should be too. But when? KTM says the bikes will be available in dealerships from May onward. You can check the bikes out on KTM’s official website, but the exact prices are yet to be out.

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Given that KTM uses a one-frame-fits-all approach when it comes to some of its model lineups, we wouldn’t be surprised if the EXC range also gets an overhaul soon. Rest assured, we’ll be the first to let you know, so stay tuned to TopSpeed.com. Until then, time to break in your new motocross boots.


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