FMF Yamaha YZ85 02-18 Fatty Expansion Chamber

FMF RACING FATTY EXPANSION CHAMBER

FMF Racing is a company that specializes in the production of high-performance motorcycle exhaust systems. One of their most popular products is the Fatty Expansion Chamber, which is designed for off-road motorcycles. The expansion chamber is hand-made from high-quality materials and is engineered to increase horsepower and torque, while also reducing weight. The design of the chamber allows for improved exhaust flow and a more aggressive exhaust note. The Factory Fatty Expansion Chamber is a popular choice among off-road Motocross riders looking to improve the sound and performance of their dirt bike.

With well over 35 years of racing experience behind it, the Fatty Gold Series pipe delivers race-proven performance. The Fatty broadens and smoothes out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-rev. No matter what type of riding you do, the Fatty has the benefits you’re looking for.

FEATURES

• More tractable power, improved throttle control
• Provides power gains throughout the entire power band
• Carbon steel with a nickel-plated finish for maximum durability
• FMF Racing’s Tru-Flo stamping process ensures a perfect fit and optimum performance.
• Can be used with FMF or stock silencer (unless noted)
• Our most popular 2-stroke pipe 
• O-Rings Included

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