Improve power throughout the rev range with the FMF Factory Fatty exhaust pipe, manufacturer part number 024056 and vendor part number 78-1359F. Designed for two-stroke performance, this pipe is engineered to provide an all-around power increase for compatible Yamaha YZ250 models while maintaining the responsive throttle characteristics expected from a high-performance motocross exhaust system.
The FMF Factory Fatty fits the 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, and 2008 Yamaha YZ250. Its application-specific design supports direct fitment on these model years, making it a practical replacement or performance upgrade for riders seeking stronger, more usable power across the engine's operating range.
Features:
- Electro-nickel plating: Provides a durable, non-chip finish designed to resist discoloration during regular riding and use.
- Factory-style construction: Includes hand-pounded welds and an uncoated finish on the Factory pipe, replicating the appearance and construction approach of works bikes.
- Broad power increase: Tuned to deliver improved performance throughout the power range rather than concentrating power in a narrow band.
- Application-specific fitment: Designed for Yamaha YZ250 two-stroke motorcycles from 1999 through 2008.
FMF brings established exhaust-system expertise to the Factory Fatty line, offering a performance-focused pipe for motocross and off-road applications. Verify the motorcycle model and year before installation to confirm compatibility.
Features:
- Electro-nickel plating provides a durable, non-chip finish designed to resist discoloration.
- Factory-style hand-pounded welds and an uncoated pipe finish replicate the appearance of works bikes.
- Designed to increase power throughout the engine's operating range.
- Fits 1999–2008 Yamaha YZ250 two-stroke models.
- Brand: FMF; Manufacturer part number: 024056; Vendor part number: 78-1359F.
Fitment:
1999 Yamaha YZ250
2000 Yamaha YZ250
2001 Yamaha YZ250
2002 Yamaha YZ250
2003 Yamaha YZ250
2004 Yamaha YZ250
2005 Yamaha YZ250
2006 Yamaha YZ250
2007 Yamaha YZ250
2008 Yamaha YZ250
2009 Yamaha YZ250
2010 Yamaha YZ250
2011 Yamaha YZ250
2012 Yamaha YZ250
2013 Yamaha YZ250
2014 Yamaha YZ250
2015 Yamaha YZ250
2016 Yamaha YZ250
2017 Yamaha YZ250
2018 Yamaha YZ250
2019 Yamaha YZ250
2020 Yamaha YZ250
2021 Yamaha YZ250
2022 Yamaha YZ250
2023 Yamaha YZ250
2023 Yamaha YZ250X
2024 Yamaha YZ250
2024 Yamaha YZ250X
2025 Yamaha YZ250
2025 Yamaha YZ250X
2026 Yamaha YZ250
2026 Yamaha YZ250X