Increase performance across the power range with the FMF Fatty Expansion Pipe, manufacturer part number 024053 and vendor part number 78-1359. Designed for 1999 through 2008 Yamaha YZ250 models, this exhaust pipe delivers a broad, all-around power increase for motocross and off-road riding. Its Fatty configuration is engineered to improve overall engine response and power delivery without focusing exclusively on low-end torque or top-end performance.
Feature: Electro-nickel-plated finish helps resist chipping and discoloration while providing durable protection for the pipe surface. The factory-style pipe option is left uncoated and includes hand-pounded welds modeled after works racing equipment. FMF offers multiple expansion-pipe configurations, including Fatty for balanced performance, Gnarly for increased low-end torque, and Rev for stronger midrange and upper-RPM power.
The FMF Fatty pipe is a direct-fit performance upgrade for compatible Yamaha YZ250 motorcycles from 1999–2008. It is suited to riders seeking stronger acceleration and a wider usable powerband for track, trail, berm, and general off-road conditions. Confirm the motorcycle model year and exhaust configuration before installation to ensure proper fitment.
Fitment: 1999–2008 Yamaha YZ250. Brand: FMF. Manufacturer part number: 024053. Vendor part number: 78-1359.
Features:
- All-around power increase throughout the Yamaha YZ250 power range
- Electro-nickel-plated finish resists chipping and discoloration
- Fatty configuration provides balanced power delivery for motocross and off-road riding
- FMF expansion-pipe family also includes Gnarly for low-end torque and Rev for midrange and top-end power
- Direct-fit design for 1999–2008 Yamaha YZ250 models
- Manufacturer part number 024053 and vendor part number 78-1359
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