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The values presented on this site are for estimation purposes only. Your actual payment may vary based on several factors such as down payment, credit history, final price, available promotional programs and incentives. Applicable tag, title, destination charges, taxes and other fees and incentives are not included in this estimate.

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2025 KTM 300 SX

  • New-2025-KTM-300 SX
  • New-2025-KTM-300 SX
  • New-2025-KTM-300 SX
  • New-2025-KTM-300 SX
  • New-2025-KTM-300 SX
  • New-2025-KTM-300 SX
  • New-2025-KTM-300 SX
  • New-2025-KTM-300 SX
  • New-2025-KTM-300 SX
  • New-2025-KTM-300 SX
  • New-2025-KTM-300 SX
  • New-2025-KTM-300 SX
  • New-2025-KTM-300 SX
  • New
  • Green Mount Road Motorsports
  • 393819
  • VBKSXP230SM393819
  • Motorcycle / Scooter
  • Off-Road

2025 KTM 300 SX

When it comes to power-to-weight ratios, the KTM 300 SX writes the rule book. Now with learnings taken directly from the KTM Factory Racing teams, and a care package labeled "Go get 'em!", the 2025 KTM 300 SX is engineered for one task alone - to lead from the front.

Features may include:

BEFORE THE GATE

CLICK INTO ACTION
  • Easy Suspension Adjustment

As always, the suspension boasts an easy tool-free setup at both ends, ensuring you chase down the podium in total control. On the rear, a hand-adjustable dual compression control allows riders to adjust high- and low-speed settings in a matter of seconds. The forks on the front end are also easily adjusted thanks to hand-adjustable clickers on the bottom of the fork shoe and top cap.

NO JETS - ONLY ROCKET SHIPS
  • 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.

CHUGGA CHUGGA, RING DING DING!
  • Electric Start

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

START STRONG

SMOOTHER POWER DELIVERY
  • EFI + Power Valve

With EFI comes great rideability. Along with the electronic fuel injection and a power valve on the KTM 300 SX, allowing for more usable power throughout the rev range. Smoother power means better traction. Better traction means holeshot heaven!

UNMATCHED PERFORMANCE
  • Performance

The new 300 cc 2-stroke powerhouse brings a new choice of weapon into the MX Open category and provides more choice for racers looking for maximum power at the least possible weight. Along with low maintenance costs, an overall engine weight of just 23,9 kg, the 2025 KTM 300 SX provides pure performance. And then some.

PICK YOUR POWER
  • Selectable Maps

The 2025 KTM 300 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.

CALM UNDER FIRE

SLEEKER FOR YOU TO SCRUB CLEANER
  • Absolute Control

Get ready for a full-on berm assault. The 2025 KTM SX and SX-F machines have received major frame updates directly from Factory Racing efforts. For starters, the frame area around the rear shock mount has been updated and made more streamlined, with new engine mounts and cut-outs for improved chassis flex. The front area of the frame is also updated. with a different wall thickness than the previous model year, with renewed engine mounts. This adds up to a 300g weight saving and improved flex for better cornering.

FLUID RIDER MOTION
  • Ergonomics

Upgraded tank shrouds using bi-compound plastics channel air towards the radiators more efficiently, while a new fuel tank roll, makes for a tighter, more secure fitment, reducing the chance of frame scrubbing and dramatically improving durability. All this works alongside the specially-developed rider triangle, to provide unmatched knee contact and gripping surfaces - especially when standing on the pegs.

  • Green Mount Road Motorsports
  • New
  • 393819
  • 2025
  • KTM
  • 300 SX
  • Motorcycle / Scooter
  • Off-Road
  • VBKSXP230SM393819
  • 1-cylinder, 2-stroke engine
  • 293.2 cm³
  • 72 mm
  • 72 mm
  • Electric starter
  • Vitesco Technologies EMS
  • Keihin EFI, throttle body 39 mm
  • 5-speed
  • Wet, DDS multi-disc clutch, Brembo hydraulics
  • Head Angle: 63.9 °
  • Neken, aluminium Ø 28/22 mm
  • 520, Non-sealed
  • Central double-cradle-type 25CrMo4 steel | Rear Subframe Design: Aluminum-reinforced polyamide
  • WP XACT-USD (AER), Ø 48 mm
  • WP XACT Monoshock with linkage
  • 310 mm
  • 300 mm
  • 260 mm
  • 220 mm
  • Disc brake
  • Disc brake
  • Spoked wheels with aluminium rims
  • 354 mm
  • 958 mm
  • 1493 mm
  • Tank: 7.2 l
  • Without Fuel: 99.4 kg

Get an Estimate for Your Payment

  • Estimated Payment
  • Calculation is estimate only.

Advertised pricing excludes applicable taxes title and licensing, dealer set up, destination, reconditioning and are subject to change without notice. Pricing may exclude any added parts, accessories or installation unless otherwise noted. Sale prices include all applicable offers. Not all options listed available on pre-owned models. Contact dealer for details.