Yoshimura · RS-5
The Yoshimura SOUND INSERT KIT 99db RS-5/RS-8 Round-Exit, 1.625" is a replacement low-volume insert kit designed for Yoshimura RS-5 and RS-8 mufflers. Built for riders who need different sound restrictions depending on where they ride, this optional kit helps tailor exhaust sound to the application, with decibel reduction varying by setup.
This kit is listed for Honda CBR1000RR 2004–2007, Honda CBR600RR 2003–2026, Kawasaki ZX-6R 2005–2008, and Suzuki LT-R450 2006–2010. Confirm the correct application using the insert chart and the fitment table on the page before installing.
Designed as a replacement low-volume insert kit for Yoshimura RS-5 and RS-8 mufflers with a round-exit configuration. It’s intended for situations where an application may require a different sound restriction than the muffler’s current setup, while keeping the exhaust system configuration consistent.
Offered as an optional kit for applications that call for specific sound limits. Yoshimura notes that decibel reduction depends on the application, so results can vary by vehicle and setup. The insert chart is the right reference to confirm selection for a particular combination.
The kit includes the core parts needed to add or replace the insert hardware: a low-volume insert tube, an end-cap collar, and a set screw. This makes it suitable for service replacement when an existing insert is worn, missing, or being changed for sound control needs.
Sound
This Yoshimura insert kit is categorized under Replacement Service Parts and is intended specifically for RS-5 and RS-8 mufflers. It’s a practical solution when an insert needs to be replaced or when sound restrictions vary by location or event requirements. Because the reduction depends on the application, choosing the correct insert for the muffler and vehicle combination is essential before installation.
Fitment
Yoshimura lists this insert kit for Honda CBR1000RR 2004–2007, Honda CBR600RR 2003–2026, Kawasaki ZX-6R 2005–2008, and Suzuki LT-R450 2006–2010. Fitment should be verified using the insert chart and the fitment information provided on the page, since insert selection is tied to the muffler configuration and application requirements.
This insert kit is specified as non-spark arrested. For riders who need to meet specific spark arrestor requirements, that distinction matters when selecting the correct exhaust components for the intended riding environment. Always confirm requirements for the application and location before choosing an insert configuration.
| Part Number | INS-09-K |
|---|---|
| Brand | Yoshimura |
| Product Line | Replacement Service Parts |
| Series | RS-5 |
| Shipping Weight | 0.5 lb |
| Barcode | 00840025908727 |
| Make | Model | Model Years |
|---|---|---|
| Honda | CBR1000RR | 2004–2007 |
| Honda | CBR600RR | 2003–2026 |
| Kawasaki | ZX-6R | 2005–2008 |
| Suzuki | LT-R450 | 2006–2010 |
Fitment as listed by Yoshimura for part number INS-09-K.
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
