FMF 020137 Fatty Pipe Expansion Chamber for Yamaha - YZ250/WR250

The FMF Fatty Pipe is the most copied expansion chamber design in the motocross world, delivering proven performance gains for Yamaha YZ250 and WR250 two-stroke motorcycles. This legendary pipe has set the standard for aftermarket exhaust systems with its ability to transform your bike's powerband characteristics.

Key Features:

• Broader, smoother powerband for improved rideability across the RPM range
• Durable nickel-plated finish resists corrosion and maintains appearance
• Includes replacement O-rings for proper installation
• 100% made in the USA with FMF's renowned quality standards
• Direct bolt-on replacement for stock exhaust pipe

The Fatty Pipe's unique geometry increases low to mid-range power while smoothing out the powerband transitions, making your bike easier to ride and more controllable in technical terrain. The nickel-plated construction ensures long-lasting durability even in harsh riding conditions.