FMF 024049 Fatty Pipe Expansion Chamber for Yamaha YZ125

The FMF Fatty Pipe is the most copied expansion chamber design in the motocross world, delivering proven performance gains for Yamaha YZ125 models from 2005-2012. This legendary two-stroke exhaust pipe is engineered to provide a broader, smoother powerband compared to stock, giving riders improved throttle response and usable power across the RPM range.

Key Features:

• Iconic Fatty design that has set the standard for two-stroke performance
• Broader, smoother powerband for better rideability
• Durable nickel-plated finish resists corrosion and maintains appearance
• Includes replacement O-rings for hassle-free installation
• Proudly made in the USA with FMF Racing's legendary quality

The FMF Fatty Pipe is designed for riders who want reliable power gains without sacrificing durability. The nickel-plated steel construction withstands the punishment of aggressive riding while the optimized chamber design extracts maximum performance from your YZ125 engine. Whether you're racing or trail riding, the Fatty Pipe delivers the performance advantage that has made it the go-to choice for two-stroke enthusiasts worldwide.