Yoshimura · RS-12
The Yoshimura SPARK ARRESTER KIT RS-12 Muffler, 1.375" (SA-20-K) is a replacement USFS approved spark arrester insert kit designed for Yoshimura RS-12 off-road mufflers. It is intended for riders who need to replace a worn or missing spark arrester, or add one as an optional setup on certain applications that were not originally equipped with a spark arrester.
Fitment spans multiple models including select GasGas, Honda, Husqvarna, KTM, and Yamaha motorcycles listed in the fitment table below. To ensure the correct application, Yoshimura notes that the insert chart should be used to confirm fitment for a specific setup.
Built as a replacement USFS approved spark arrester for Yoshimura RS-12 off-road mufflers, this kit is aimed at restoring the correct spark arrester configuration when servicing an RS-12 system used in off-road environments.
For applications not originally equipped with a spark arrester, Yoshimura lists this kit as an optional spark arrester solution. Application should be verified using the insert chart before purchase to confirm correct fitment.
The SA-20-K kit includes the spark arrester insert along with the end-cap collar and a set screw. These components are provided together to support a straightforward replacement or addition on compatible RS-12 muffler setups.
Fitment
Compatibility depends on the exact application, so the listed make, model, and year ranges should be confirmed using the fitment table on the page. Yoshimura also recommends referencing the insert chart to confirm fitment for a specific application before installation, helping ensure the correct match for the intended RS-12 muffler setup.
Installation
An installation PDF is provided on the product page to support proper setup. Since this kit includes the insert, end-cap collar, and set screw, using the installation document can help verify the correct assembly sequence and hardware placement for the compatible RS-12 off-road muffler applications.
| Part Number | SA-20-K |
|---|---|
| Brand | Yoshimura |
| Product Line | Replacement Service Parts |
| Series | RS-12 |
| Shipping Weight | 1 lb |
| Barcode | 00840025910546 |
| Make | Model | Model Years |
|---|---|---|
| GasGas | EX-250F | 2023 |
| GasGas | EX-350F | 2023 |
| GasGas | MC-250F | 2021–2023 |
| GasGas | MC-350F | 2022–2023 |
| Honda | CRF300L | 2021–2026 |
| Honda | CRF300L-Rally | 2021–2026 |
| Husqvarna | FC250 | 2019–2022 |
| Husqvarna | FC350 | 2019–2022 |
| KTM | 250SX-F | 2019–2022 |
| KTM | 250XC-F | 2019–2020 |
| KTM | 350SX-F | 2019–2022 |
| KTM | 350XC-F | 2019–2020 |
| Yamaha | WR250F | 2020–2023 |
| Yamaha | YZ250F | 2019–2023 |
| Yamaha | YZ250FX | 2020–2023 |
| Yamaha | YZ450F | 2026–2027 |
Fitment as listed by Yoshimura for part number SA-20-K.
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
