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FMF Fatty Pipe

(7 reviews)

Item: 325826

$251.99 – $512.99

Select Your Vehicle - Fitment Guaranteed

FMF Fatty Pipe


FMF's Fatty pipe broadens the power band and provides a healthy power increase everywhere. Improved throttle response, a linear power band and enhanced over-rev all add up to a pipe that everyone will benefit from. The Fatty pipe is FMF's most popular pipe for that same reason. If you're riding trails, tracks or in the open desert, this pipe has what you're looking for.

  • Tru-Flo stamping process ensures a perfect fit and optimum performance
  • Nickel plated finish for long-lasting good looks
  • Includes O-rings
  • Made in the USA
Specification Details
Country of Origin USA
Finish Nickel Plated
Material Steel
Quantity Varies (make selection above)

Vehicle Fitment


Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

Beta
  • Xtrainer 2015-2019
Gas Gas
  • MC 65 2021-2023
Honda
  • ATC250R 1985-1986
  • CR125R 1990-2007
  • CR250R 2-Stroke 1997-2007
  • CR500R 1989-2001
  • CR80R 1996-2002
  • CR80RB Expert 1996-2002
  • CR85R 2003-2007
  • CR85RB Expert 2003-2007
  • TRX250R FourTrax 250R 2x4 1986-1989
Husaberg
  • TE 250 2011-2014
  • TE 300 2011-2014
Husqvarna
  • CR125 2003-2006
  • TC 125 2014-2022
  • TC 250 2011-2022
  • TC 65 2017-2023
  • TC 85 2018, 2020-2023
  • TE 125 2014-2015
  • TE 150 2017-2019
  • TE 250 2011-2018
  • TE 250i 2018-2023
  • TE 300 2014-2018
  • TE 300i 2018-2019
  • TX 300 2017-2019
  • TX 300i 2020-2022
  • WR125 2003-2006
KTM
  • 105 SX 2007-2012
  • 105 XC 2008-2009
  • 125 SX 2000-2010, 2012-2022
  • 144 SX 2007-2008
  • 150 SX 2009-2022
  • 150 XC 2010-2014
  • 150 XC-W 2017-2019
  • 250 EXC 2004-2005
  • 250 EXC-G Racing 2004-2005
  • 250 SX 2004-2022
  • 250 SX-F 2005-2010
  • 250 XC 2006-2019
  • 250 XC TPI 2020-2022
  • 250 XC-F 2007-2009
  • 250 XC-W 2006-2018
  • 250 XC-W TPI 2018-2023
  • 300 EXC 2004-2005
  • 300 MXC 2004-2005
  • 300 XC 2006-2019
  • 300 XC TPI 2020-2022
  • 300 XC-W 2006-2018
  • 300 XC-W TPI 2020-2021
  • 50 SX 2009-2022
  • 65 SX 2009-2023
  • 85 SX 2003-2019, 2021-2022
  • 85 XC 2008-2009
Kawasaki
  • KDX200 1989-1994
  • KDX250 1991-1994
  • KFX80 ATV 2003-2006
  • KX100 1998-2009, 2011-2021
  • KX125 1990-1991, 1995-2005
  • KX250 2-Stroke 1992-2002, 2004-2007
  • KX65 2003-2023
  • KX80 1998-2000
  • KX85 2002-2023
Suzuki
  • LT250R QuadRacer 250 1985-1992
  • LT500R QuadRacer 500 1987-1990
  • LT80 QuadSport 80 1987-2006
  • RM100 2003
  • RM125 1997-2007
  • RM250 1996-2008
  • RM65 2003-2005
  • RM85 2002-2010, 2012, 2015-2023
  • RM85L 2003-2010, 2012
Yamaha
  • PW50 Y-Zinger 1983, 1985-1987, 1990-2009, 2013-2014
  • PW80 Y-Zinger 1991-2006
  • WR200R 1992
  • WR250Z 1991-1997
  • YFS200 Blaster 1988-2006
  • YFZ350 Banshee 1987-2006
  • YZ125 1996-2024
  • YZ125X 2020-2022
  • YZ250 2-Stroke 1984-1986, 1989, 1991-2024
  • YZ250X 2-Stroke 2023-2024
  • YZ65 2018
  • YZ85 2002-2024

Customer Reviews

Write Review

Great product

By   on  Verified Purchaser

Nice product and quality.


Nice pipe for woods bike

By   on  Verified Purchaser

Great pipe! Had to mount the front bolt and grommet opposite direction as stock, but otherwise bolted right up. O rings came installed but went ahead and put on fresh springs and coupler. Very smooth roll on from bottom to top paired with a Shorty silencer. Perfect for woods racing.


Fatty pipe

By   on 

Amazing


Great

By   on  Verified Purchaser

Great price! Product as described.


Thank you!

By   on  Verified Purchaser

Everything was perfect!


Fatty Pipe

By   on  Verified Purchaser

Everything you want, steady power all the way through.


Good Fit

By   on  Verified Purchaser

Ordered this pipe. Received the wrong one, called and was immediately dealt with. Sent wrong pipe back in and received correct one fast which fit nice and snug and sounds excellent!


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Questions & Answers

Ask Question

Will this pipe fit a 1999 yz250?

Yes, just be sure to choose the 1999 Yamaha YZ250 before adding to the cart.

By Andy
Answer Question

Is there a place I can find just the orings needed for this pipe

If you were to search our site for FMF Pipe O-ring kit you will find what you are looking for.

By Andy
Answer Question

Do these pipes come as a pair for my YFZ350?

Yes, the Banshee pipes from FMF are sold in pairs.

By Staff
Answer Question

Will this pipe fit my 1998 kx 125

Yes, if you were to choose the 1998 Kawasaki KX125 FMF Fatty Pipe from our fit guide, you'd receive the correct pipe to fit your bike. 

By Staff
Answer Question

Will a Pro Circuit R-304 silencer fit on the FMF Fatty pipe for my 1997 Suzuki RM80? Is an exhaust gasket included each pipe sold?

Just about every FMF pipe we sell is designed to fit silencers of any kind that work with the stock pipe. So long as the silencer on your machine fits the stock pipe, you should have no problem fitting FMF's RM80 fatty pipe to your machine. As far as the gaskets go, yes, those are included in the kit so you'll have a proper seal at the RM80's exhaust port.

By Staff
Answer Question

Will this fit my 2009 rm85

Yes, if you were to choose the 20009 Suzuki RM85 FMF Fatty Pipe from our fit guide, you'd receive the correct RM 85 Fatty Pipe from FMF to fit your machine. Just choose your bike from our fit guide and you'll get exactly what you need!

By Staff
Answer Question

I have a Kawasaki KX125. Is the pipe supposed to have 3 dents on the side that faces the bike?

Yes, absolutely! It's not at all unusual to see what appear to be dents on a brand new FMF pipe. Many of FMF's pipes have what appear to be dents on the sides that face the bike or in places that are near the radiator, engine or bodywork. The dents are carefully engineered to provide clearance between the pipe and the bike in order to maximum engine performance and throttle response.

By Staff
Answer Question

Does it come with springs?

Most FMF pipes do not include exhaust springs, in which case you are to re-use the OEM springs. Should the FMF pipe's design be significantly different that stock and requires a particular set of springs, they'll be included with the pipe.

By Staff
Answer Question

what type of jetting and needle stuff do i need for the pipe

Without knowing exactly what machine it is that you have, we cannot say for sure what kind of jetting will be required. That said, we do make a wide range of FMF carburetor jet kits that come with everything you need to work with any of FMF exhaust system. In each kit you will find easy-to-understand instructions as well as a range of components to tailor fueling to your machine's exact needs.

By Staff
Answer Question

What type of jetting will I need? My bike is a 2000 kx125. It has a fmf fatty high range pipe on it now

While it's impossible to say exactly what jetting will work best with your needs due to factors such as your bike's overall state of tune, where you do most of your riding and the fuel used, a good baseline may be as follows. Keep in mind, these recommendations are for a bike that's running a 32:1 fuel-to-oil mix ratio using a 50/50 mix of race fuel and super-unleaded gasoline and ridden at around sea level. Main jet: 160 Pilot jet: 45 Fuel needle position: 3rd Power jet: stock Air screw: 1.5 Those settings may not be perfect for your needs, but they serve as an excellent starting point to get the most out of your bike. From there, common jetting adjustments will apply to get you truly dialed in for the best possible throttle response and engine power output.

By Staff
Answer Question

Does the pipe come with gaskets?

All FMF pipes come equipped with the O-ring gaskets to seal the pipe to the factory exhaust port on the stock cylinder head.

By Staff
Answer Question

Is this a left side pipe

All FMF Fatty pipes are a complete header pipe for each particular model and exit the motorcycle on the same side as the stock pipe. If your machine has more than one cylinder, both pipes would be included - one for each side. For example, a Yamaha YFZ350 Banshee would have both pipes included in the kit.

By Staff
Answer Question

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