Yoshimura
The Yoshimura SOUND INSERT KIT ALPHA/ALPHA T Muffler (INS-20-K) is a replacement low-volume insert kit designed for Yoshimura ALPHA mufflers and ALPHA T mufflers. It offers a practical way to tailor exhaust sound output on supported applications where different sound restrictions may be required, while keeping the system configured with Yoshimura service parts.
This kit is listed for a wide range of fitments, including BMW G310GS 2018–2024, BMW G310R 2018–2024, KTM 390-DUKE 2017–2018, KTM RC390 2017–2018, and many additional models shown in the fitment table below. Decibel reduction varies by application.
Built as a replacement low-volume insert kit for Yoshimura ALPHA mufflers. It is intended to help reduce sound output depending on the specific application, making it a useful option when a different sound restriction setup is needed for the same muffler platform.
The kit includes the key pieces needed for the insert setup: a low-volume insert tube, an end-cap collar, and a set screw. These components are packaged together as a service-part solution for maintaining or updating the muffler’s insert configuration.
Yoshimura notes this insert can be available as an optional kit on applications that require different sound restrictions. Because results vary, the amount of decibel reduction depends on the particular model and application listed for this part number.
Sound
As part of Yoshimura Replacement Service Parts, the INS-20-K is meant for riders looking to replace or add a low-volume insert configuration on an ALPHA or ALPHA T muffler. Rather than changing the muffler itself, this kit focuses on the insert hardware used at the end-cap area, providing a straightforward path to restore missing components or set up an alternate restriction option when appropriate for the application.
Included
This kit is made up of three listed components: the low-volume insert tube, an end-cap collar, and a set screw. Together, they form the insert assembly used with Yoshimura ALPHA mufflers. For step-by-step guidance, refer to the installation PDF shown on the product page for this part number.
Fitment
Yoshimura lists this insert kit for a broad mix of sport, naked, and small-displacement models across multiple manufacturers. Fitment includes specific year ranges for BMW, CFMOTO, Honda, Kawasaki, KTM, Suzuki, and Yamaha models. To ensure the correct application, match the motorcycle exactly to the model and model year shown in the fitment table below.
| Part Number | INS-20-K |
|---|---|
| Brand | Yoshimura |
| Product Line | Replacement Service Parts |
| Shipping Weight | 0.75 lb |
| Barcode | 00840025908765 |
| Make | Model | Model Years |
|---|---|---|
| BMW | G310GS | 2018–2024 |
| BMW | G310R | 2018–2024 |
| BMW | G310R-G310-GS | 2018 |
| BMW | G310R-G310GS | 2018 |
| CFMOTO | 450NK | 2024–2026 |
| CFMOTO | 450SS | 2023–2026 |
| CFMOTO | 675SS | 2025–2026 |
| Honda | CB750-Hornet | 2025–2026 |
| Kawasaki | NINJA-500 | 2024–2026 |
| Kawasaki | Ninja-650 | 2017–2018, 2020–2026 |
| Kawasaki | Z500 | 2024 |
| Kawasaki | Z650 | 2020–2026 |
| Kawasaki | Z800 | 2016 |
| Kawasaki | ZX-10R-RR | 2012–2026 |
| Kawasaki | ZX-4R | 2023–2026 |
| Kawasaki | ZX-4RR | 2023–2026 |
| Kawasaki | ZX-6R | 2019–2026 |
| KTM | 390-DUKE | 2017–2018 |
| KTM | RC390 | 2017–2018 |
| Suzuki | GSX-8R | 2024–2026 |
| Suzuki | GSX-8S | 2023–2026 |
| Suzuki | GSX-8T-TT | 2026 |
| Suzuki | GSX-R1000 | 2013, 2016–2027 |
| Suzuki | SV650 | 2017–2024 |
| Suzuki | SV650X | 2019–2021, 2023–2024 |
| Yamaha | MT-07 | 2018–2026 |
| Yamaha | MT-09-FZ-09 | 2021–2026 |
| Yamaha | MT-10 | 2018–2023 |
| Yamaha | Tracer-9-GT | 2021–2022 |
| Yamaha | YZF-R1 | 2015–2019 |
| Yamaha | YZF-R3 | 2015–2025 |
| Yamaha | YZF-R6V | 2006–2018 |
| Yamaha | YZF-R9 | 2025–2026 |
Fitment as listed by Yoshimura for part number INS-20-K.
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
