The FMF Factory Fatty Pipe is designed to provide an all-around power increase throughout the engine’s usable power range. Built for the 2025 Beta 300 RX 2-stroke, this performance expansion chamber supports strong, responsive power delivery for motocross and off-road riding applications. The Factory Fatty design is engineered to complement the Beta 300 RX engine while maintaining the fit and function expected from a premium replacement performance pipe.
Constructed with hand-pounded welds, the FMF Factory pipe uses a finish and manufacturing approach inspired by works bikes. Unlike coated expansion chambers, the Factory pipe has no exterior coating, providing a clean, purpose-built appearance that highlights its hand-finished construction. Its design is intended for riders seeking dependable performance enhancement and authentic race-style craftsmanship for their Beta 300 RX.
Fitment: This FMF Factory Fatty Pipe fits the 2025 Beta 300 RX 2T, also identified as the Beta 300 RX 2-stroke. The manufacturer part number is 025319, and the vendor part number is 025319. Confirm motorcycle year, model, engine type, and existing exhaust configuration before installation to ensure proper application. This product is intended as a replacement or performance upgrade for the compatible factory expansion chamber.
Features:
- Power Increase: Designed to deliver an all-around increase in power throughout the usable engine range.
- Hand-Pounded Welds: Features hand-pounded welds for a works-bike-inspired appearance and construction.
- Uncoated Factory Finish: Uses no exterior coating, unlike FMF electro-nickel-plated pipes, to preserve the authentic Factory pipe look.
- Application: Designed for the 2025 Beta 300 RX 2-stroke motorcycle.
- Brand and Part Number: FMF Factory Fatty Pipe, manufacturer and vendor part number 025319.
Fitment:
2025 Beta 300 RX (2T)