Yoshimura · RS-4
The Yoshimura SPARK ARRESTER KIT RS-4 Muffler, 1.500" is a replacement spark arrester solution designed for RS-4 Off-Road Mufflers. It is intended for riders who need a USFS Approved Spark Arrester for their RS-4 setup, whether replacing an existing insert or adding an optional spark arrester on applications that were not originally equipped with one.
Fitment includes select GasGas, Honda, Husqvarna, KTM, and Yamaha models and model years as listed in the fitment table below. The kit is supplied as a complete package with the spark arrester insert, end-cap collar, and set screw to help restore proper configuration on compatible RS-4 muffler applications.
Sound
Built as a replacement USFS Approved Spark Arrester for RS-4 Off-Road Mufflers. This kit is designed to bring back the correct spark arrester configuration on compatible RS-4 applications when the original insert is worn, damaged, or missing.
Fitment
For applications not originally equipped with a spark arrester, this kit is offered as an optional spark arrester solution for compatible RS-4 muffler setups. It provides a straightforward path to configure an RS-4 off-road muffler with a spark arrester where applicable.
Installation
Includes the key components needed for installation: a spark arrester insert, an end-cap collar, and a set screw. For application-specific confirmation, reference the insert chart shown on the page to verify the correct match for the intended setup.
Sound
As part of Yoshimura’s Replacement Service Parts line for the RS-4 series, this spark arrester kit is designed specifically for RS-4 Off-Road Mufflers using a 1.500" configuration. It serves as a direct replacement-style solution for maintaining an RS-4 muffler’s spark arrester arrangement on compatible applications, helping keep the system properly equipped with the correct insert-style component.
Fitment
This spark arrester kit is listed for specific GasGas, Honda, Husqvarna, KTM, and Yamaha models and model years. Because spark arrester and insert applications can vary, Yoshimura notes that the insert chart should be used to confirm fitment for a particular application. Review the fitment table on the page to ensure the motorcycle and year match what is specified for this kit.
Installation
The page includes an installation PDF to support a correct install approach for this kit. With the included spark arrester insert, end-cap collar, and set screw, the kit is packaged to provide the necessary pieces for the intended RS-4 setup. Always verify fitment first, then follow the provided installation documentation for the appropriate procedure details.
| Part Number | SA-04-K |
|---|---|
| Brand | Yoshimura |
| Product Line | Replacement Service Parts |
| Series | RS-4 |
| Shipping Weight | 0.6 lb |
| Barcode | 00840025909281 |
| Make | Model | Model Years |
|---|---|---|
| GasGas | EX-250F | 2023 |
| GasGas | EX-350F | 2021–2023 |
| GasGas | MC-250F | 2021–2023 |
| GasGas | MC-350F | 2022–2023 |
| Honda | crf450x | 2019–2026 |
| Husqvarna | Norden-901 | 2022–2023 |
| KTM | 790-ADVENTURE | 2019–2020 |
| KTM | 890-ADVENTURE | 2021–2023 |
| Yamaha | WR250F | 2020–2023 |
| Yamaha | YZ250F | 2019–2026 |
| Yamaha | YZ250FX | 2020–2023 |
Fitment as listed by Yoshimura for part number SA-04-K.
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
