YOSHIMURA RS-12: SEVENTY YEARS OF RACING PEDIGREE, AVAILABLE FOR YOUR KTM SX-F.

Because nothing says “yes, I geek out over factory gear” quite like purchasing a premium exhaust system.

KTM 250 SX-F fitted with Yoshimura RS-12 exhaust.

Right, so here’s the thing about Yoshimura, seventy-plus years of racing pedigree doesn’t just happen by accident. It happens by testing relentlessly and refusing to build anything that doesn’t improve your riding experience.  The latest Yoshimura RS-12 full system for KTM’s SX-F platform is everything you’d expect from a company perfecting exhaust systems since 1954.

UNLOCK THAT SIGNATURE YOSHIMURA GROWL!

That unmistakable Yoshimura growl is engineered exhaust flow meeting seven decades of racing know-how. But it’s not just noise for the sake of noise. That distinctive sound is the byproduct of an exhaust system that makes your motorcycle perform better.

2025 KTM 250 SX-F fitted with Yoshimura RS-12 exhaust.

KTM / HUSQVARNA Platform.

For the 250cc & 350cc platforms, Yoshimura’s R&D engineers focused on getting this new powerplant to carry power all the way through the range. The result? A much wider power curve with +2.7% more max horsepower and +2.6% max torque. For those on the 450cc platform, the numbers get even more interesting by adding +5.9% peak horsepower and a stonking +6.9% max torque!

But here’s where things get clever. This RS-12 is the first Yoshimura production motocross exhaust to incorporate resonators on both the header and in the muffler. That new header resonator unlocks bottom and midrange power, making the Austrian bikes not only more powerful but providing additional overrev.

For the geek in you:

  • Revolutionary dual resonator technology.
  • Tuned header resonator for power & sound.
  • Premium materials with precision machined joints.
  • More bottom and midrange power delivery.
  • More usable power across rev range.
  • Works-look matte carbon fibre end cap.
  • Tapered muffler body inlet design enables the system to be pushed forward thus helping with weight centralization without sacrificing performance.

It’s race-bred engineering that delivers genuine performance gains you can feel every time you twist the throttle.

Yoshimura RS-12 full exhaust system  for the KTM 450 SX-F

RS-12 Stainless Full Exhaust System, w/ Aluminum Muffler.
Part #: YO-262540S320
Models: 250/350 SX-F 2022 to 2026.

RS-12 Stainless Full Exhaust System, w/ Aluminum Muffler.
Part #: YO-264631S320
Models: 450 SX-F 2022 to 2026

RS-12 Stainless Slip-On Exhaust, w/ Aluminum Muffler
Part #: YO-262542S320
Models: 250/350/450 SX-F 2022 to 2026.

Kevin Moranz Racing KTM with Yoshimura exhaust.

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