Yoshimura · RS-9
The Yoshimura SOUND INSERT KIT RS-9 Muffler, 1.000" (INS-RS9A-K) is a replacement low-volume insert kit designed for Yoshimura RS-9 mufflers. Built as a service part in the Replacement Service Parts line, it provides an option for applications that require different sound restrictions, with decibel reduction varying by application.
This kit is listed for Honda CRF250R 2014 and Honda CRF450R 2013–2015. For exact application confirmation, refer to the fitment table and the insert chart shown on the page.
Sound
Designed as a replacement low-volume insert kit for RS-9 mufflers, this Yoshimura insert helps tailor exhaust sound output when different sound restrictions are required. Because results vary by setup, decibel reduction depends on the specific application.
Fitment
This RS-9 insert kit is specified as non-spark arrested. It is intended for riders who need a low-volume insert solution for compatible RS-9 muffler applications without a spark arrestor configuration.
Installation
The kit includes the key components needed for installation: a low-volume insert tube, an end-cap collar, and a set screw. An installation PDF is provided on the page to support correct fit and assembly.
Sound
Part of Yoshimura’s Replacement Service Parts line for the RS-9 series, INS-RS9A-K is intended as a dedicated sound insert kit for RS-9 mufflers. It’s positioned as an optional kit for certain applications where different sound restrictions are required, offering a straightforward path to replace or add a low-volume insert to an existing RS-9 setup.
Fitment
This kit is described as a low-volume insert solution, with the important note that decibel reduction depends on application. To ensure the correct match, Yoshimura advises confirming fitment using the insert chart. The page also includes fitment details so the correct application can be verified before installation.
Installation
Yoshimura lists this insert kit for Honda CRF250R 2014 and Honda CRF450R 2013–2015. For quick verification, consult the fitment table shown on the page. Installation guidance is supported with an installation PDF link provided alongside the product content.
| Part Number | INS-RS9A-K |
|---|---|
| Brand | Yoshimura |
| Product Line | Replacement Service Parts |
| Series | RS-9 |
| Shipping Weight | 0.35 lb |
| Barcode | 00840025914315 |
| Make | Model | Model Years |
|---|---|---|
| Honda | CRF250R | 2014 |
| Honda | CRF450R | 2013–2015 |
Fitment as listed by Yoshimura for part number INS-RS9A-K.
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
