FMF Gold Series Pipe, "Fatty Moto"

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FMF Gold Series Pipe, "Fatty Moto"
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FMF Gold Series Pipe, "Fatty Moto"

Our Price: $197.99$251.99

MSRP: $219.99 - $279.99 - You save up to $28.00 (10% off)

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Additional Videos

FMF Factory | Inside Look

How to - 2 Stroke Pipe Install

RM YouTube Channel

Details

    FMF's Gold Series Fatty Moto is one of their most popular pipes because it provides a smooth power band, increases in power all along the curve, and better control regardless of where you are in the power band.

    Unusable peaks in power will be leveled out and more power in the lows and mids will be added. The top end doesn't suffer since all the original punch is maintained along with more over-rev. That means more fun all around no matter the type of riding you like.

    Why? Because with more usable power you get a better hook up during acceleration and more control while you ride aggressively on dicey terrain.

    And with FMF using their Tru-Flo stamping process and signature nickel plated finish, contours are consistent and corrosion is kept at bay throughout the header pipe's steel body.

    Specs:
  • Improved power throughout band
  • Increased over-rev
  • Smooth power delivery
  • Carbon steel body with nickel plating prevents corrosion
  • Tru-Flo stamping process ensures proper contours and fitment
  • Most models include new O-rings
  • Made 100% in the USA

FMF Gold Series Pipe, "Fatty Moto" Reviews

Each review submitted enters you into a
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
 
4.8 / 5.0
171 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
149
18
3
0
1
Value
4.6 / 5
Durability
4.8 / 5
Ease of Installation
4.9 / 5
Fitment
4.8 / 5
Performance
4.9 / 5
Finish
4.8 / 5
Features
4.7 / 5
Recommend it?
Yes (50)
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Flawless process.
Great pipe, great sound. Would definitely buy again from Rocky Mountain. Thanks
August 10, 2018
Southington, Ct, UM
Purchased
2 weeks ago
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
MUST buy
Great pipe makes my bike sound great compared to stock and it also makes the bike look great MUST buy

-m-2018 YAMAHA YZ125--
My beautiful 2018 yamaha yz125 that I'm building now only if rocky mountain a tv would sponsor me ??
My beautiful 2018 yamaha yz125 that I'm building now only if rocky mountain a tv would sponsor me ??
August 3, 2018
East worcester, NY, US
Age: 15-24
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'7 - 5'9
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Great part, great sound, easy installation
Pipe went on easy, sounds great! and power was increased. I’ve been on three rides with the new pipe so far and I couldnt be happier with the purchase. Only thing i would recommend is getting a new rubber gasket for the connection between the muffler and expansion chamber. I have a 2015 KTM 250 SX and the stock rubber connector was letting a small amount of smoke out. Easy fix though.

-m-2015 KTM 250 SX--
July 9, 2018
Coatesville, PA, US
Age: 15-24
Purchased
1 month ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Fmf is always good
Really good power characteristics and on my 17 300xc it is more compact than stock
July 8, 2018
Windsor , NY, US
Age: 25-44
Purchased
3 months ago
Gender:
Male
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Excellent
I had the gnarly before, no gain over the stock pipe. But, with the Fatty the throttle is a little more crisp. You can also tell in the mid to top (which it is designed for)

-m-1998 HONDA CR500R--
June 25, 2018
Idaho Falls, ID, US
Age: 25-44
Purchased
over 3 years ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Smoking pipe
Replaced old PC pipe on my cr125. Looks great.

-m-1997 HONDA CR125R--
97 CR
97 CR
June 14, 2018
North Phoenix, AZ, US
Age: 45-64
Purchased
3 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'10 - 6'0
Value
4 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Looks Great installed
Really improved my son's 2017 YZ 85

-m-2017 YAMAHA YZ85--
June 7, 2018
Sapulpa, OK, US
Age: 45-64
Purchased
3 months ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
2018 ktm 250 sx
Wanted to smooth out and broaden the power of my 2 stroke, it did exactly what it was described as doing, fit and Finnish was perfect fit, verry happy.

-m-2017 KTM 250 SX--
June 5, 2018
Damascus, OR, US
Age: 45-64
Purchased
2 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
6'1 - 6'3
Value
3 / 5
Durability
3 / 5
Ease of Installation
5 / 5
Fitment
3 / 5
Performance
5 / 5
Finish
3 / 5
Features
4 / 5
Recommend it?
Yes
Over all great fit on one bike and not so good on another.. seams to be the only exhaust chamber available for 96-01 yz125's
It's fmf so it's a great product! It does get much hotter than stock and the fmf factory fatty..not sure why although it does not not have as "twisted" and as large of an exhaust chamber as the pro-circuit and fmf factory fatty.. it some how performs just as well. Could be why it gets hotter..?.. the fitment is great on my 98 yz125 although on my 99yz125 (different part #, difference is the way it connect to cylinder) the kicker hit the pipe..that is 1 negative ..although not worth sending back. Also I wish I knew how to keep the fmf gold fatty series to keep from dulling.. maybe it's in the instructions..?..
It definitely increases hp. I would go with the fmf factory fatty if available for your bike..
May 14, 2018
Raleigh , NC, US
Age: 45-64
Purchased
3 months ago
Gender:
Male
Weight:
131 - 160 lbs.
Height:
5'7 - 5'9
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Pipe
Installed this on my boys bike an it made a big difference in power at low to mid
March 24, 2018
Weeksbury, KY, US
Age: 25-44
Purchased
7 months ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'10 - 6'0
Each question or answer submitted enters you into a:
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 10 questions Browse 10 questions and 42 answers
Is the best exuast for the 2016 kx85 the fatty pipe along with the shorty silencer ?
A shopper on Sep 1, 2016
BEST ANSWER: Regarding KX85 Fatty (yes, I would recommend the more general Fatty over the Narley). However this also depends on your riding environment (woods or MX and overall needs). If you want more top end (Speed) then consider other, but for general broad improvement mostly bottom to mid range the Fatty is golden, without compromising additional weight. If you want additional durability & slightly more weight than the thicker metal Narley is a comparable solution to the Fatty. Shorty sliencer is icing on the top. Sweet combination!
Dose it come with springs and o rings???
tomi v on Feb 14, 2017
BEST ANSWER: Does not come with springs and I cannot remember if it comes with new orings but I would order them just to be safe. Definitely no springs were included.
Does this come with new springs and o rings?
A shopper on Feb 9, 2017
BEST ANSWER: I'm pretty sure the pipe came with a new o-ring but the springs were not included. If you call customer service they are awesome to answer any questions. If anything doesn't work they'll make it right. Best company I've ever dealt with for parts. The local shops can't get your parts as quick.
Does this exhaust pipe have the exhaust tip on it or include it?
Payton R on Feb 26, 2018
BEST ANSWER: This doesn't include the silencer. There are several that FMF makes to specify to your power needs. If your looking for overall power increase, this is a good pipe.
im looking for a pipe with the best top end. which do you perfer? i run a cr250r on a racing flat track kart. completely different than how it runs on a bike. thanks!
A shopper on Aug 8, 2017
BEST ANSWER: I bought this pipe for a 2013 xc KTM. I had a black pro circuit that came from a racer friend. If you can find a pro C I would try that for the top end. I know apples and oranges but it was a world of difference for me.
how many powerbands will this add?
cody l on Nov 24, 2017
BEST ANSWER: It fatty takes the top end powerband away and seems too concentrated in the mid and lower area of the powerband.
What would be a good exhaust system for a 1999 rm 125 for woods?
A shopper on Jun 26, 2018
BEST ANSWER: A fatty moto pipe is more for a mid to top end powerband as well as a thinner steel. A gnarly pipe is a better woods pipe if your need better bottom. End power. I've used both pipes and that had been my experience.
Hello this fits a 1991 Suzuki rm 80 will it fit a 1991 Suzuki rm 250?
hayden h on Apr 30, 2018
BEST ANSWER: Unfortunately, this will not fit. The pipe is different in between the the RM250 and the RM80.
Will this pipe fit a 1990 Honda cr125r 2 stroke?
Payton R on Feb 26, 2018
BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application. If you have a 2018 year model but don't see your machine as an option, please contact a tech via Live Chat or call us at 1-800-336-5437 for assistance.
What is with the FMF Gold Series Pipe, "Fatty Moto"
Fits: 2006 YAMAHA YZ125
Part# 1087090099?

There is nothing on FMF website that refers to it as "FMF Gold Series Pipe, "Fatty Moto". Why can't we see the mfr part # to match and know what we are buying?
Derek C on Mar 9, 2017
BEST ANSWER: Their manufacturer part number is 024049. On their website it is just called Fatty under the two stroke pipes.
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