FMF Factory — Pipe 2-Stroke — Yamaha YZ125/YZ125X (024077)

The Factory Fatty is our top-tier 2-stroke expansion chamber, built with hand-cone construction in our Southern California factory. The Factory designation means each pipe is hand-rolled and TIG-welded for a true factory-replica race pipe. Broadens the powerband across the entire RPM range with improved throttle response.

• Hand-cone, hand-rolled construction — built in California
• Tru-Flo stamping process for exact fit
• Broad powerband with strong over-rev
• Hand-TIG-welded seams
• Includes O-rings

This is a 2-stroke exhaust. It is engineered for the 2-stroke engine architecture above and physically will not fit a 4-stroke bike. Verify your engine type before purchase.