Yoshimura · RS-12
The Yoshimura Sound Insert Kit RS-12 Muffler, 1.500" is a replacement low-volume insert kit designed for Yoshimura RS-12 mufflers. It is intended for riders who need an optional insert solution on applications that require different sound restrictions, with decibel reduction varying by application.
This kit is listed for Kawasaki KX450F 2024–2026, Kawasaki KX450X 2024–2026, Triumph TF250 2024–2026, and Triumph TF450, TF450-C, TF450-E, and TF450-X 2025–2026. See the fitment table and insert information on the page to confirm the correct application.
Built as a replacement low-volume insert kit specifically for RS-12 mufflers, this setup is aimed at applications where a different sound restriction may be needed. Decibel reduction depends on the specific application, so results can vary by model and configuration.
This insert kit is identified as non-spark arrested. For applications where spark arresting is required, reference the insert chart information shown on the page to confirm the appropriate setup for the intended use and application.
The kit includes the low-volume insert tube, an end-cap collar, and a set screw. As a Replacement Service Parts item, it is intended to support service or changes to sound-restriction needs on compatible RS-12 muffler applications.
Sound
Yoshimura positions this Sound Insert Kit as a replacement low-volume insert solution for RS-12 mufflers. It is also noted as an optional kit for applications that require different sound restrictions, making it a practical choice when a specific setup calls for a low-volume insert configuration. Because decibel reduction depends on application, confirmation for the intended model and use case is recommended using the page’s insert reference information.
Installation
This insert kit is comprised of three key components: a low-volume insert tube, an end-cap collar, and a set screw. Those items are intended to provide the hardware needed for installation as a service or replacement part for RS-12 muffler applications. An installation PDF is provided on the page to support correct installation procedures.
| Part Number | INS-30-K |
|---|---|
| Brand | Yoshimura |
| Product Line | Replacement Service Parts |
| Series | RS-12 |
| Shipping Weight | 1 lb |
| Barcode | 00840025910553 |
| Make | Model | Model Years |
|---|---|---|
| Kawasaki | KX450F | 2024–2026 |
| Kawasaki | KX450X | 2024–2026 |
| Triumph | TF250 | 2024–2026 |
| Triumph | TF450 | 2025–2026 |
| Triumph | TF450-C | 2025–2026 |
| Triumph | TF450-E | 2025–2026 |
| Triumph | TF450-X | 2025–2026 |
Fitment as listed by Yoshimura for part number INS-30-K.
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
