Yoshimura · RS-12
The Yoshimura RS-12 Replacement End Cap Kit is a complete service-parts solution designed to refresh or replace the end cap on RS-12 mufflers. Built around a matte finish carbon fiber end cap, this kit provides the components needed for an end cap swap without piecing parts together individually.
It fits the models listed in the fitment table, including select GasGas, Honda, Husqvarna, Kawasaki, KTM, Suzuki, Triumph, and Yamaha applications across multiple model years. For riders and builders maintaining an RS-12 setup, this kit is a straightforward way to restore a clean look and properly reassemble the muffler end cap area with the correct supporting hardware.
Materials
At the center of the kit is a matte finish carbon fiber end cap. Yoshimura describes it as a lightweight carbon fiber component made with heat resistant pre-impregnated material and produced in its composites shop in Chino, California.
Sound
This end cap kit is packaged as an all-in-one replacement bundle for an RS-12 end cap swap. It includes the carbon fiber end cap along with rivets and a sound insert hole grommet, supporting a clean and complete reassembly.
Included
To finish the job with a refreshed appearance, the kit includes an RS-12 complete sticker kit. It is a practical detail for service work where the muffler is being rebuilt and the exterior presentation is being updated at the same time.
Yoshimura positions this as a Replacement Service Parts offering for the RS-12 series, built specifically to support end cap replacement work. Rather than sourcing individual items separately, this kit consolidates key pieces used during an end cap swap, helping keep the process consistent when servicing an RS-12 muffler.
Engineering
The included carbon fiber end cap is described by Yoshimura as being made in its composites shop in Chino, California. The manufacturer specifies heat resistant pre-impregnated, matte finished lightweight carbon fiber, aligning the replacement part with the design intent of RS-12 components while delivering a clean, finished look.
Fitment
Fitment is application-specific, and this kit is intended for RS-12 mufflers used on the models and model years shown in the fitment table. An installation PDF is provided on the page to support the end cap swap process and help ensure the parts in the kit are installed correctly.
| Part Number | YM1-CFR-K-1 |
|---|---|
| Brand | Yoshimura |
| Product Line | Replacement Service Parts |
| Series | RS-12 |
| Shipping Weight | 1 lb |
| Barcode | 00840025911635 |
| Make | Model | Model Years |
|---|---|---|
| GasGas | EX-250F | 2023 |
| GasGas | EX-350F | 2021–2023 |
| GasGas | MC-250F | 2021–2023 |
| GasGas | MC-350F | 2022–2023 |
| Honda | CRF250R | 2022–2027 |
| Honda | CRF250RX | 2022–2026 |
| Honda | CRF300L | 2021–2026 |
| Honda | CRF300L-Rally | 2021–2026 |
| Honda | CRF450R | 2021–2026 |
| Honda | CRF450R-S | 2023–2024 |
| Honda | CRF450RX | 2021–2026 |
| Honda | Transalp | 2024–2026 |
| Husqvarna | FC250 | 2019–2022, 2025–2027 |
| Husqvarna | FC350 | 2019–2022, 2025–2027 |
| Husqvarna | FC450 | 2024–2027 |
| Husqvarna | FX350 | 2023, 2025 |
| Kawasaki | KX250F | 2021–2026 |
| Kawasaki | KX250X | 2021–2026 |
| Kawasaki | KX450X | 2024 |
| KTM | 250SX-F | 2019–2022, 2025–2027 |
| KTM | 250XC-F | 2025–2026 |
| KTM | 350SX-F | 2019–2022, 2025–2027 |
| KTM | 350XC-F | 2025–2026 |
| KTM | 450SX-F | 2024–2027 |
| Suzuki | RM-Z450 | 2018–2026 |
| Triumph | TF250 | 2024–2026 |
| Triumph | TF450 | 2025–2026 |
| Triumph | TF450-C | 2025–2026 |
| Triumph | TF450-E | 2025–2026 |
| Triumph | TF450-X | 2025–2026 |
| Yamaha | WR250F | 2020–2023 |
| Yamaha | YZ250F | 2019–2026 |
| Yamaha | YZ250FX | 2020–2023 |
| Yamaha | YZ450F | 2022–2025 |
| Yamaha | YZ450FX | 2022 |
Fitment as listed by Yoshimura for part number YM1-CFR-K-1.
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
