Factory 4.1 RCT Exhaust Silencer 19-26 Yamaha WR YZ 250 F FX - FMF 044453
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The FMF Racing Factory 4.1 RCT Slip-On exhaust system is engineered for riders seeking maximum performance, improved mass centralization, and enhanced durability. It features FMF's proprietary Resonance Chamber Technology and Factory Forward Engineering, utilizing aerospace-grade aluminum and a carbon fiber end cap for a lightweight yet strong construction. The shorter, robust design aids in mass centralization and reduces the risk of damage, while the stainless steel midpipe ensures longevity and corrosion resistance. This premium slip-on system offers substantial power and torque gains across the entire RPM range. It includes a screen-type spark arrestor and a 94dB quiet insert for versatility. The system also incorporates the Rapid Tuning System (RTS) for easy setup and adjustments, and its total weight is 7.8 lbs. This product is intended for closed-course competition use only. Item ID 044453.
- SKU
- 06-9890.F4N
- Brand
- FMF Exhausts
- Availability
- In Stock (2)
Fitments (19)
| Make | Model | Year |
|---|---|---|
| YAMAHA | WR 250F | 2023 |
| YAMAHA | WR 250F | 2024 |
| YAMAHA | YZ 250F | 2019 |
| YAMAHA | YZ 250F | 2020 |
| YAMAHA | YZ 250F | 2021 |
| YAMAHA | YZ 250F | 2022 |
| YAMAHA | YZ 250F | 2023 |
| YAMAHA | YZ 250F | 2024 |
| YAMAHA | YZ 250F | 2025 |
| YAMAHA | YZ 250F | 2026 |
| YAMAHA | YZ 250FX | 2020 |
| YAMAHA | YZ 250FX | 2021 |
| YAMAHA | YZ 250FX | 2022 |
| YAMAHA | YZ 250FX | 2023 |
| YAMAHA | YZ 250FX | 2024 |
| YAMAHA | YZ 250FX | 2025 |
| YAMAHA | YZ 250FX | 2026 |
| YAMAHA | YZF 250 | 2019 |
| YAMAHA | YZF 250 | 2020 |
- General Product Group
- Exhaust Systems & Parts
- General Product Type
- Silencer
- Variant Id
- 285410
FULL DESCRIPTION
FMF Racing Factory 4.1 RCT Slip-On Exhaust Silencer
The FMF Racing Factory 4.1 RCT Slip-On is engineered for riders seeking the ultimate blend of mass centralisation, power, and durability. Developed with FMF's proprietary Resonance Chamber Technology™ and Factory Forward Engineering, this system utilises aerospace-grade materials, delivering both weight reduction and exceptional strength. The short, robust design improves mass centrality and decreases the risk of crash damage, while a carbon end cap and stainless steel midpipe ensure outstanding longevity and aesthetics. Manufactured entirely at FMF’s Southern California facility, this premium slip-on offers serious power gains across the RPM range for demanding off-road applications.
Key Features
- Closed course competition use only for maximum performance
- Robust slip-on configuration with single outlet
- Aerospace-grade aluminium construction with carbon fibre end cap for strength and lightweight
- Rapid Tuning System (RTS) streamlines setup and adjustments
- Reduced weight improves handling (7.8 lbs)
- Substantial power and torque enhancements across all revs
- Includes screen-type spark arrestor and 94dB quiet insert
- Premium stainless steel midpipe for resilience and corrosion resistance
Specifications
- Type: Slip-On
- Configuration: Single
- Construction: Aluminium
- Finish: Natural
- Midpipe: Stainless Steel
- End Cap: Carbon
- Spark Arrestor: Screen Insert (included)
- Quiet Insert: 94dB Insert (included)
- Weight: 7.8 lbs
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