FMF Factory 4.1 RCT Slip-On Muffler 044429 — Yamaha YZ250F / WR250F / YZ250FX 2014-2019

Product Description

Transform your Yamaha's performance with the FMF Factory 4.1 RCT Slip-On Muffler. Designed for the YZ250F, WR250F, and YZ250FX platforms, this muffler utilizes FMF's patented Resonance Chamber Technology (RCT). This innovative core shape effectively reduces decibel levels while significantly enhancing power output across the entire RPM range, giving your bike the responsive, hard-hitting performance needed for track or trail.

Engineered from high-quality blue anodized titanium with a rugged carbon fiber end cap, this exhaust is as durable as it is lightweight. FMF’s Factory Forward Engineering pulls the unit closer to the center of the bike, improving mass centralization for superior handling and better protection during falls. Proudly made in the USA, this system is a direct bolt-on upgrade that works seamlessly with your stock header or an FMF aftermarket header.

Top Features: FMF Factory 4.1 RCT Slip-On Muffler

• Resonance Chamber Technology maintains peak power while meeting sound requirements.
• Internal ducting increases exhaust volume for improved flow and power gains.
• Factory Forward Engineering optimizes mass centralization for better bike handling.
• Versatile end cap design enables easy installation of spark arrestors or sound-tuning inserts.

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Is this system sound-compliant for off-road racing?
A: Yes, it is designed to meet AMA and FIM sound requirements. A QuietCore 94 dB insert is included in the box for added sound suppression if needed.

Q: Does this include a spark arrestor?
A: Yes, the muffler comes with a spark arrestor pre-installed or included, making it compliant for riding in protected public lands where spark arrestors are mandatory.

Expert Pro-Tip

Expert Pro-Tip: To get the most out of your YZ250F engine, ensure your air filter is clean and your fuel mapping is updated to match the improved flow of this exhaust. Many riders find that a slight adjustment to the fuel mapping helps eliminate any decel-pop and ensures the engine runs cooler and stronger across the board.

Recommended Pairings

Recommended Pairings:
o Yamaha YZ250F / YZ250FX Performance Parts
o MX Performance Chains
o Premium Motorcycle Chemicals & Maintenance

About Moto-House MX

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.

Moto-House MX – Choice of Champions – Clermont / Montverde, FL. Central Florida's premier powersports source with lightning-fast worldwide shipping.