FMF Factory Fatty Pipe 024069 — Yamaha YZ65 2018-2025

Product Description

The FMF Factory Fatty Pipe is designed to provide the same level of performance and craftsmanship once reserved exclusively for professional Factory Race Teams. By utilizing a lighter 20-gauge steel for the body and a durable 19-gauge steel for the header, this pipe is engineered to broaden and smooth out your Yamaha YZ65's power curve. Whether you are attacking technical sections or hitting the track, the Factory Fatty delivers noticeable gains in low-end grunt, mid-range pull, and increased over-rev.

FMF’s attention to detail is evident in every weld and curve. The hand-pounded seams ensure smooth flow transitions, allowing exhaust gases to exit the engine efficiently for maximum power output. If you are looking to transform the personality of your bike, the Factory Fatty is the proven choice, offering a balanced performance boost that helps every level of rider find more speed and better throttle control.

Top Features: FMF Factory Fatty Pipe

• Works-Inspired Performance: Shares the same race-proven characteristics and high-quality craftsmanship as factory team pipes.
• Broadened Powerband: Smoothes out the power delivery while adding more low-end, mid-range, and over-rev.
• Durable Construction: Built using 20-gauge steel for the body and 19-gauge steel for the header.
• Precision Flow: Hand-pounded seams provide optimized exhaust flow transitions.
• Versatile Performance: Engineered to provide consistent, reliable gains for any riding style.

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 the Factory Fatty require jetting changes?
A: Yes, whenever you install a performance exhaust, it is recommended to adjust your jetting to match the increased airflow for optimal engine performance and reliability.

Q: Is this pipe compatible with my stock silencer?
A: Yes, the FMF Factory Fatty is designed to work with your stock silencer, though pairing it with an FMF silencer will yield the best power characteristics.

Expert Pro-Tip: Always use new exhaust O-rings and a fresh silencer gasket when installing your new pipe. A small leak at the cylinder port can significantly hurt performance and may cause your bike to run lean, which can lead to engine damage. A thin layer of high-temp silicone sealant on the O-rings can help ensure a leak-proof seal.

Recommended Pairings:
o Yamaha YZ65 Performance Parts & Upgrades
o Yamaha 2-Stroke Performance Parts
o Essential Engine & Chassis Tools

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