Yoshimura · RS-2
The Yoshimura SOUND INSERT KIT 99db RS-2 Muffler, 1.500" is a replacement low-volume insert kit built for Yoshimura RS-2 mufflers. Designed for riders who need to meet different sound restrictions, this optional kit provides a straightforward way to configure an RS-2 muffler setup for the application.
This kit is listed for Can-Am DS450 2008–2009, Honda CRF150R-B 2007–2014, Honda TRX450ER 2006–2014, Honda TRX450R 2006–2009, Suzuki RM-Z250 2007–2009, Yamaha WR450F 2007–2011, Yamaha YZ250F 2007–2010, and Yamaha YZ450F 2006–2009. Decibel reduction depends on application; refer to the fitment information on the page to confirm the correct match.
Configured as a replacement low-volume insert kit for RS-2 mufflers, this set is intended for applications that call for different sound restrictions. Because decibel reduction depends on application, the final result can vary by model and setup, making application confirmation an important step before installation.
This insert kit is specified as non-spark arrested. For riders selecting components based on riding area requirements or event rules, that designation matters when choosing the correct insert option for the intended application.
The kit includes a low-volume insert tube, an end-cap collar, and a set screw. These parts are intended to work together as a complete insert solution for compatible Yoshimura RS-2 muffler applications listed on the page.
Sound
Yoshimura positions this as a Replacement Service Parts item for the RS-2 series, giving RS-2 muffler owners a dedicated low-volume insert option. It is also noted as an optional kit for applications requiring different sound restrictions, making it a practical choice when rules or preferences call for a quieter configuration. Since the outcome varies, confirming the correct application before purchase helps ensure the insert is the right match for the specific RS-2 setup.
Fitment
Fitment is model- and year-specific, covering select Can-Am, Honda, Suzuki, and Yamaha applications shown in the fitment table on the page. Yoshimura also notes using an insert chart to confirm fitment for a given application. Checking those details before installation is especially important because sound reduction depends on application and because this kit is intended for RS-2 mufflers used on the listed models.
Installation
For a smoother install, the page includes an installation PDF link. Using the provided document helps ensure the insert tube, end-cap collar, and set screw are fitted correctly for the RS-2 muffler configuration. This is a simple way to align the parts as intended and verify the insert is seated and secured properly during assembly.
| Part Number | INS-08-K |
|---|---|
| Brand | Yoshimura |
| Product Line | Replacement Service Parts |
| Series | RS-2 |
| Shipping Weight | 0.5 lb |
| Barcode | 00840025908710 |
| Make | Model | Model Years |
|---|---|---|
| Can-Am | DS450 | 2008–2009 |
| Honda | CRF150R-B | 2007–2014 |
| Honda | TRX450ER | 2006–2014 |
| Honda | TRX450R | 2006–2009 |
| Suzuki | RM-Z250 | 2007–2009 |
| Yamaha | WR450F | 2007–2011 |
| Yamaha | YZ250F | 2007–2010 |
| Yamaha | YZ450F | 2006–2009 |
Fitment as listed by Yoshimura for part number INS-08-K.
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
