The FMF Factory 4.1 RCT slip-on exhaust is engineered for Kawasaki KX250F and KX250X motocross and off-road motorcycles. This tuned exhaust system combines FMF Resonance Chamber Technology with application-specific core specifications to help optimize power output while reducing sound levels. The included Titanium Megabomb is designed to complement the exhaust system and improve overall performance for each compatible machine.
Its patented core shape lowers exhaust sound while maintaining strong power production, and the patented canister shape provides additional internal volume for increased sound-absorbing material. A patented chamber design helps enhance and refine exhaust pressure, supporting responsive engine performance across the powerband. Factory Forward Engineering centralizes the exhaust system’s mass and helps reduce exposure to crash damage during demanding riding conditions.
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 FMF Factory 4.1 RCT is supplied as a slip-on exhaust with a carburetor cap and is designed for compatible Kawasaki 250cc applications. It fits the 2021 Kawasaki KX250X, 2021 Kawasaki KX250F, 2022 Kawasaki KX250F, 2022 Kawasaki KX250X, 2023 Kawasaki KX250F, 2023 Kawasaki KX250X, 2024 Kawasaki KX250F, and 2024 Kawasaki KX250X. Manufacturer and vendor part number: FMF 042394.
Features:
- Resonance Chamber Technology: Uses advanced chamber technology to help reduce sound while maintaining maximum power output.
- Patented Core Shape: Lowers exhaust sound levels while supporting strong engine performance.
- Patented Canister Shape: Increases internal volume for additional sound-absorbing material.
- Patented Chamber Design: Enhances and refines exhaust pressure for tuned performance.
- Factory Forward Engineering: Centralizes system mass and helps reduce vulnerability to crash damage.
- Application-Specific Tuning: Uses optimized core specifications for compatible Kawasaki KX250F and KX250X models.
- Rear End Cap: Supports simple installation of tuning tip inserts or a spark arrestor.
- Titanium Megabomb Included: Helps optimize power output for the intended motorcycle application.
- Fitment: Fits 2021-2024 Kawasaki KX250F and KX250X models as specified.
Fitment:
2021 Kawasaki KX250F
2021 Kawasaki KX250X
2022 Kawasaki KX250F
2022 Kawasaki KX250X
2023 Kawasaki KX250F
2023 Kawasaki KX250X
2024 Kawasaki KX250F
2024 Kawasaki KX250X