Yoshimura R&D of America, Inc.

SOUND INSERT KIT RS-9/RS-9T Mufflers, 1.250" dia. (INS-RS9D-K)

SOUND INSERT KIT RS-9/RS-9T Mufflers, 1.250" dia. (INS-RS9D-K) - Main image
$24.98 $40.95 In stock

Category: Replacement Service Parts

Yoshimura introduces a new muffler insert that is made to optimize the sound and performance for the 2020 Honda CRF250R. However, this new insert works in all RS-9 and RS-9t mufflers.

  • Low-Volume Insert Kit for RS-9 And RS-9T Mufflers
  • Non-Spark Arrested
  • Available as optional kit on applications requiring different sound restrictions
  • Decibel reduction depends on application
  • Please see our Insert Chart to confirm fitment for your application
      • Kit Includes:
    • Low-Volume Insert Tube
    • End-cap collar
    • Set screw

*If you have any questions about fitment or applications, please call our Sales Department at 1-800-634-9166.

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Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Sofia ★★★★★

I was worried the sound might be too muffled, but the 1.250" diameter fits perfectly and gives a nice deep tone without being obnoxious.

Nicholas W. ★★★★★

The low-volume insert really cleaned up the sound on my RS-9 without killing the power—perfect for the track. Noticed it dropped the decibels just enough to be neighbor-friendly during practice laps. Took maybe 10 minutes to swap out using the included hardware.

Hazel ★★★★★

Installed this low-volume insert on my 2020 CRF250R and it really cleans up the bark without choking the bike. The 1.250" diameter fits perfectly in the RS-9 muffler and gives a deeper tone I was after.

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