FMF Factory Fatty Rev Pipe (Fatty Pipe) 024078 - Yamaha YZ125 / YZ125X 2022-2026
Product Description
The FMF Factory Fatty Rev Pipe is engineered to focus your machine's power delivery squarely into the middle and upper RPM ranges[cite: 1]. Developed through extensive track and dyno testing for this specific application[cite: 1], this expansion chamber provides responsive power where you need it most when pushing hard on the track or trail.
Built to handle rigorous off-road conditions, this high-performance pipe comes complete with new o-rings[cite: 1] to ensure a tight, reliable seal against your cylinder right out of the box.
Top Features: FMF Factory Fatty
- Focuses power delivery effectively in the middle and upper rpm ranges[cite: 1].
- Rigorously dyno and track tested for exact application performance[cite: 1].
- Includes fresh o-rings for a secure, leak-free installation[cite: 1].
- Designed to optimize exhaust scavenging and expand top-end pull.
Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.
Fitment List
| Year Range |
Vehicle Brand |
Vehicle Model & Sub-Model |
| 2022-2026 |
Yamaha |
YZ125 |
| 2023-2026 |
Yamaha |
YZ125X |
Frequently Asked Questions
Q: Where does the Factory Fatty Rev pipe deliver its primary power gains?
A: This pipe is specifically designed to concentrate power delivery in the middle and upper RPM ranges[cite: 1].
Q: Are replacement seals included with the pipe?
A: Yes, o-rings are included[cite: 1] to facilitate a proper seal during installation.
Expert Pro-Tip: When mounting a new expansion chamber, always use high-temp silicone around the header joint if needed and ensure the frame mounts are left slightly loose until all spring hooks and cylinder flanges are aligned to prevent binding or stress cracks.
Recommended Pairings:
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