FMF Factory Fatty Pipe 024077 — Yamaha YZ125 YZ125X 2022-2026

Product Description

The FMF Factory Fatty Pipe is engineered for riders who demand peak power and durability from their two-stroke machines. Designed to provide a broader, smoother powerband, this pipe is the industry standard for performance upgrades, giving your Yamaha YZ125 or YZ125X the aggressive throttle response needed to dominate the track or the trail.

Crafted with precision, this pipe utilizes 20-gauge steel for the main body to reduce overall weight, while incorporating a robust 19-gauge steel header for increased strength in high-heat areas. The signature hand-pounded seams ensure smooth, unrestricted flow transitions, effectively eliminating exhaust gas turbulence to maximize engine efficiency and overall output.

Top Features: FMF Factory Fatty Pipe

• Lighter 20-gauge steel construction for the body to minimize weight
• Heavy-duty 19-gauge steel used for the header portion for improved durability
• Hand-pounded seams ensuring smooth, efficient flow transitions
• Includes high-quality O-rings for a perfect, leak-free seal

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: Will I need to re-jet my carburetor after installing this pipe?
A: Yes, in most cases, adding a high-performance exhaust pipe like the Factory Fatty alters the air/fuel ratio. We highly recommend checking your jetting to ensure your engine runs optimally.

Q: Does this pipe come with the silencer?
A: No, this is for the expansion chamber only. However, the Factory Fatty works perfectly with the stock silencer or an FMF performance silencer.

Expert Pro-Tip: When installing a new pipe, always use a fresh exhaust gasket and high-temp silicone sealant. A slight air leak at the flange will cause your bike to run lean and can quickly lead to top-end damage on a 125cc engine.

Recommended Pairings:
o Yamaha 2-Stroke Performance Parts & Upgrades
o Yamaha YZ125 Performance Parts & Upgrades
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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