FMF Factory Fatty Pipe - '01-'07 RM125 023058

If you're running a 2-stroke dirt bike, your exhaust pipe is where raw engine potential either gets realized or wasted. The FMF Factory Fatty delivers the kind of power curve optimization that separates competitive riders from the rest—smoothing out mid-range sluggishness while unlocking low-end grunt and top-end over-rev that translates to real lap times. Built with the same craftsmanship philosophy as the factory race pipes that dominated the podium, this is a bolt-on upgrade that actually performs.

The Factory Fatty broadens your power delivery across the entire RPM range, giving you the low-end response for trail sections, the mid-range punch for transition zones, and the extended over-rev for aggressive line selection. Whether you're racing, trail riding, or testing limits on the track, this pipe transforms how your RM125 responds to throttle input.

• Fits: 2001–2007 RM125
• Body: 20-gauge steel
• Header: 19-gauge steel
• Seams: Hand-pounded
• Installation: Bolt-on
• Power: Full-range increase
• MPN: 023058