FMF Factory Fatty Pipe – Yamaha YZ125/YZ125X (2022–2026)

All-around power everywhere. The FMF Factory Fatty delivers broad, usable power gains across the entire RPM range—electro-nickel plated for durability and that signature FMF performance that's dominated championships for decades.

The FMF Factory Fatty Pipe (024077) is designed for riders who want power everywhere. Electro-nickel plated finish won't chip or discolor, while precision-engineered expansion chamber design boosts horsepower and torque from bottom to top. Whether you're hitting tight woods or wide-open tracks, the Fatty delivers usable power when you need it. Compatible with FMF Powercore silencers for maximum performance.

What's Included

• FMF Factory Fatty Pipe – electro-nickel plated
• Mounting hardware and springs

Key Features

• All-Around Power Increase – gains throughout entire RPM range
• Electro-Nickel Plated Finish – non-chip, won't discolor
• Broad Powerband – usable everywhere, not peaky
• FMF Championship Engineering – decades of race-proven performance
• Durable Construction – built to handle race abuse
• Works with Stock or Aftermarket Silencers – versatile compatibility
• Precision Welded – leak-free operation

Fitment

• 2022–2026 Yamaha YZ125
• 2022–2026 Yamaha YZ125X
• 2022–2023 Yamaha YZ125 Monster Energy RE

Install Notes

• Direct bolt-on replacement for stock pipe
• Installation time: 1–2 hours
• Basic mechanical skill required
• May require jetting adjustment for optimal performance
• Recommended pairing: FMF Powercore II Silencer