FMF Gold Series Fatty Pipe 024049 — Yamaha YZ125 / YZ125X 2020-2021

Product Description

The FMF Gold Series Fatty Pipe is the ultimate performance upgrade for riders looking to unlock the full potential of their 2020-2021 Yamaha YZ125 or YZ125X. This exhaust is computer-designed and dyno-tested to deliver significant power gains exactly where your machine needs them most, broadening the powerband for improved tractability and aggressive mid-to-top end pull.

Engineered with FMF’s precision Tru-Flo stamping process, the Fatty pipe ensures a perfect fitment to your cylinder, optimizing exhaust scavenging for peak engine efficiency. Constructed from high-strength 19-gauge steel and finished with a durable nickel-plating, this pipe is built to withstand the rigors of off-road riding while maintaining a factory-fresh aesthetic for years to come.

Top Features: FMF Gold Series Fatty Pipe

• Computer-designed and dyno-tested for machine-specific power gains
• Tru-Flo stamping process ensures a perfect fit and optimum performance
• Constructed from heavy-duty 19-gauge steel for long-term durability
• Nickel-plated finish provides superior protection against wear and elements

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: Does this pipe work with the stock silencer?
A: Yes, the FMF Fatty pipe is designed to be a direct replacement for your stock unit and is fully compatible with your stock silencer, though we recommend an FMF performance silencer for the best power delivery.

Q: Will I need to adjust my carburetor jetting?
A: Yes, adding a performance exhaust pipe changes the airflow characteristics of the engine. We highly recommend re-jetting your carburetor to match the increased exhaust flow for maximum reliability and power.

Expert Pro-Tip: When installing a new 2-stroke pipe, don't forget to replace your exhaust O-rings. A fresh seal prevents pressurized exhaust gas from leaking at the header, which causes a loss of bottom-end "snap" and prevents messy oil buildup on your engine cases.

Recommended Pairings:

o Yamaha YZ125 Performance Parts & Upgrades
o Yamaha 2-Stroke Performance Parts
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.

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