Yoshimura · RS-12
The Yoshimura Sound Insert Kit for RS-12 mufflers is a replacement low-volume insert kit designed to help tailor exhaust sound levels for specific applications. This kit is offered as an optional solution on setups that require different sound restrictions, with decibel reduction varying by application.
This insert kit fits Honda CRF300L 2021–2026, Honda CRF300L-Rally 2021–2026, and Triumph TF250 2024–2026 applications as listed in the fitment table below. It is a non-spark arrested insert, making it a focused choice for riders who need a compatible RS-12 low-volume insert configuration for the models shown.
Sound
Built specifically as a replacement low-volume insert kit for Yoshimura RS-12 mufflers, this setup is intended to restore the correct insert configuration or provide an optional sound-restriction alternative where different requirements apply.
Installation
The kit includes a low-volume insert tube, an end-cap collar, and a set screw. These components provide the core pieces needed to install the insert configuration specified for applicable RS-12 muffler setups.
Fitment
Listed by Yoshimura for the Honda CRF300L (2021–2026) and CRF300L-Rally (2021–2026); Triumph TF250 (2024–2026). See the fitment table below for every model year.
Sound
Yoshimura positions this as a low-volume insert kit for RS-12 mufflers, intended for riders who need a replacement insert or an optional insert choice for applications requiring different sound restrictions. Because decibel reduction depends on application, the specific result will vary based on the motorcycle and exhaust configuration shown in the fitment information on this page.
Fitment
This sound insert kit is listed for Honda CRF300L 2021–2026, Honda CRF300L-Rally 2021–2026, and Triumph TF250 2024–2026. Fitment should be confirmed before installation by referencing the insert chart for the correct application match, along with the fitment table shown on the product page.
Installation
Each kit includes the low-volume insert tube, end-cap collar, and set screw, providing the primary parts needed for installation into compatible RS-12 muffler configurations. An installation PDF is provided on the page to support correct assembly and placement of the insert components.
| Part Number | INS-34-K |
|---|---|
| Brand | Yoshimura |
| Product Line | Replacement Service Parts |
| Series | RS-12 |
| Shipping Weight | 1 lb |
| Barcode | 00840025912823 |
| Make | Model | Model Years |
|---|---|---|
| Honda | CRF300L | 2021–2026 |
| Honda | CRF300L-Rally | 2021–2026 |
| Triumph | TF250 | 2024–2026 |
Fitment as listed by Yoshimura for part number INS-34-K.
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
