The FMF Factory 4.1 RCT Slip-On Exhaust is engineered for riders seeking improved exhaust performance, refined sound control, and application-specific tuning. This system features a stainless steel canister with a carbon fiber end cap and includes a titanium Megabomb designed to optimize power output on the 2026 Yamaha WR125R. FMF Part Number 044485 combines advanced exhaust technology with a compact, race-inspired design made for demanding off-road use.
The patented core shape helps reduce sound levels while maintaining strong power output, while the expanded canister shape increases internal volume for additional sound-absorbing material. A patented chamber design refines exhaust pressure to support responsive engine performance across the powerband. Factory Forward Engineering centralizes the exhaust mass, helping reduce exposure to crash damage and maintaining a balanced installation.
This tuned exhaust uses optimized core specifications developed for the Yamaha WR125R application. The innovative rear end cap allows straightforward installation of tuning tip inserts or a spark arrestor, making the system adaptable for different riding environments and requirements. The included titanium Megabomb further supports application-specific power optimization. The FMF Factory 4.1 RCT Slip-On fits the 2026 Yamaha WR125R. Professional installation and verification of local sound and emissions requirements are recommended.
Features:
- Resonance Chamber Technology: Incorporates FMF's latest design approach for controlled sound and performance.
- Patented Core Shape: Lowers sound levels while maintaining maximum power output.
- Patented Canister Shape: Increases internal volume for additional sound-absorbing material.
- Patented Chamber Design: Enhances and refines exhaust pressure for responsive performance.
- Factory Forward Engineering: Centralizes mass and helps reduce vulnerability to crash damage.
- Application-Specific Tuning: Uses optimized core specifications for the 2026 Yamaha WR125R.
- Innovative Rear End Cap: Simplifies installation of tuning tip inserts or a spark arrestor.
- Titanium Megabomb Included: Helps optimize the motorcycle's power output.
- Fitment: Designed for the 2026 Yamaha WR125R.
- Construction: Stainless steel canister with carbon fiber end cap.
Fitment:
2026 Yamaha WR 125 R