The FMF Factory Fatty Pipe is designed to deliver an all-around power increase throughout the power range of compatible Yamaha YZ85 two-stroke motorcycles. Its expansion-chamber design helps improve engine performance and throttle response, making it a practical upgrade for riders seeking stronger, more usable power across the track or trail.
Built for direct fitment on 2002 through 2011 Yamaha YZ85 models, this FMF performance pipe is manufactured for dependable motocross use. The electro-nickel-plated finish provides a durable, non-chip surface that resists discoloration during normal riding conditions. The finish also gives the pipe a clean appearance while helping protect it from everyday wear.
FMF Manufacturer Part Number 024039, also identified by vendor part number 78-1312F, is engineered specifically for the listed Yamaha YZ85 applications. This product is the Factory Fatty pipe configuration and is intended for riders who want an enhanced power delivery without sacrificing broad engine usability. Installation should be completed using appropriate replacement gaskets, springs, and mounting hardware as needed for the motorcycle.
Fitment: 2002–2011 Yamaha YZ85
Features:
- Power Increase: Delivers an all-around increase in performance throughout the power range.
- Electro-Nickel-Plated Finish: Provides a durable, non-chip surface that resists discoloration.
- Yamaha YZ85 Fitment: Designed for 2002 through 2011 Yamaha YZ85 two-stroke motorcycles.
- Factory Fatty Design: Built by FMF for broad, usable motocross power and responsive engine performance.
- Manufacturer Part Number: FMF 024039.
- Vendor Part Number: 78-1312F.
Fitment:
2002 Yamaha YZ85
2003 Yamaha YZ85
2004 Yamaha YZ85
2005 Yamaha YZ85
2006 Yamaha YZ85
2007 Yamaha YZ85
2008 Yamaha YZ85
2009 Yamaha YZ85
2010 Yamaha YZ85
2011 Yamaha YZ85
2012 Yamaha YZ85
2013 Yamaha YZ85
2014 Yamaha YZ85
2015 Yamaha YZ85
2016 Yamaha YZ85
2017 Yamaha YZ85
2018 Yamaha YZ85