KX250/X 25-26 RS-12 Stainless Full Exhaust, w/ Stainless Muffler

The newest version of the Kawasaki KX250F is here, and Yoshimura has an RS-12 Signature Series full system exhaust to help boost the new green machine right up onto the podium! Just like Nick DeFeo as it helped bring him the 2025 NEPG Pro 2 Championship!

The latest KX250F boasts a new chassis and engine package. That meant it was time to go to work to see what can be done to add performance to the new KX. During development the new 250 was very responsive to our RS-12. We were able to add up to 3.3% more HP at 11,000 rpm and up to 3.4% more torque at 10,600 rpm. This gives the 2025 KX250F added power on top and more connectivity on the bottom and mid point of the power spectrum.

Our new RS-12 for the 2025 KX250F comes with an INS-31-K sound insert installed. This insert not only produces an ear pleasing exhaust note, it also makes the best power for the new Kawasaki. Also available separately is an SA-21-K spark arrestor when venturing out into the woods is your jam.

Some of the features of the new RS-12 include:

• Carbon Faced Machined Joint: Our new Carbon Faced Machined Joint no longer requires the use of anti-seize. This is accomplished by impregnating the surface of the stainless steel joint with carbon atoms. The result is a reduction in wear over the life of the joint by reducing friction.
• Header Resonator: Our header resonator isn't just there for looks, it allows us to maximize power across the spectrum, while enhancing rider connectivity.
• Repack Kits, optional Inserts and Spark Arresters are available for all models

Proudly designed, developed and made in the USA!

Sound Insert/Spark Arrester Options