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2005 KTM 125SX

FMF Factory Fatty Pipe

Retail: $249.99
$229.99
You Save: $20.00 (8%)
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FITS: 2005 KTM 125SX change
 
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FMF Factory Fatty Pipe - Main

Product Description

The Factory Fatty is reminiscent of the "works" or cone pipe once used by Factory Teams. It shares many of the same characteristics with its craftsmanship and material quality. Thoroughly tested and developed by the best racers in the sport, this pipe delivers true "works" style technology to the public. Looking to turn your bike into a race-ready powerhouse? The Factory Fatty is the first step you should take for bolt-on performance.

  • Works performance meets superior style.
  • Offers increased torque and throttle control.
  • Used by record breaking madman Robbie Maddison and the FMF Factory off-road team.
  • Supplied O-rings ensure a flawless fit.
  • Quality construction for maximum durability.
  • Unplated 20-gauge header and 19-gauge body for that "Factory" look.
  • The perfect modification to any 2-stroke race bike.

Note: Pipe may include factory indentations for proper installation clearance.

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(11)
4.8 out of 5 stars
5 star   9
4 star   2
3 star 0
2 star 0
1 star 0
TheIdahoKid Location: St. Maries, ID 83861, USA
montanamaniac Location: Helena, Mt
1-8 of 11
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Verified Purchaser
Location: St. Maries, ID 83861, USA
2013 50sr FMF pipe

This pipe is so worth the money. 22% HP gain in this bike. 2.5hp and it hits hard. Turn your sr into an sxs with this pipe. They do not do anything different at the factory. Go from an 85 to a 90 main jet and let it rip. Evan is now getting the holeshots on the cobra's

FMF Factory Fatty Pipe
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Location: new zealand
Excellant purchase

The exhaust made a good power increase throughout the whole rev range only problem is that it is prone to rust unless looked after exceptionally carefully.

Overall
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Ease of Installation
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Power!

added lots of power to my ktm 125. power was more noticable in bottom to mid range pull. Bought with a jd jet kit which helped a ton

Overall
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Location: Port Orchard, WA, USA
2012 yz 125

love the pipe and its almost worth your money but if u put your bike away muddy or dirty the it will rust and it will not come off with wd40. it wont look the best if u dont wash it after your done riding.

FMF Factory Fatty Pipe
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Top 500 Contributor
Location: Grand Rapids, MI
FMF does it again!!!

I have this pipe on both my 05' CR125 and 07' CR250. For 125's you can expect a healthy increase in midrange pull with a little bit more over rev. Throttle response is also improved slightly if jetted correctly. For a 250 you can expect to see an increase in the bottom through midrange with a little more over rev. Where this pipe stands out is that it delivers a healthy amount of power just about everywhere but in a useable nature. Fit and bolt on is spot on and both pipes were matted with a shorty silencer. I gave the durability a 4 because as with any "works" finish pipe you have to rub it down with wd40 and give it a sos pad scrub once in a while to keep away the rust. Overall great pipe from a company keeping 2 strokes alive.

FMF Factory Fatty Pipe
Overall
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Helena, Mt
Toughest pipes

FMF makes a great product. Adds more usable power where needed and is much stonger than stock. I have had a few procircuit pipes on my yz250 and loved the power but the are not near as tough as these.

Overall
Top 250 Contributor
I love this

this does exacctly wat it says i just got it for my 2012 ktm125sx it gives a huge power inccrease

Overall
Location: Somewhere, USA
Sounds great

This pipe sounds great and has a lot of power! I plan on buying this for all of my other dirtbikes as well! :)

1-8 of 11
Total Questions (4)
Questions with answers:
  4
Questions without answers:
0
1-4 of 4
NickW 1 month 25 days ago Location: Nebraska, USA
Same?
Are the exhuast system bends the same between a 2006 and 2014 yz125.
MotoSport Staff Expert
1 month 24 days ago Location: Portland, OR, USA
Yes, Actually the same FMF Factory Fatty Pipe would used on 2004-2014 Yamaha YZ125's.
Powerrr 4 months 4 days ago Location: Texas, USA
Should i get this or Pro-Circuit pipe?
i ride a 2014 KTM 85 looking for power and performance
Expert MotoSport Staff
3 months 16 days ago Location: Portland, OR, USA
Whether you were to go with a FMF or a Pro Circuit exhaust system on your KTM 85SX you would get great power and performance over the stock exhaust system. FMF and KTM do work together to design their exhausts so there may be an advantage there in going with the FMF pipe on your KTM.
cr85555555555 4 months 23 days ago
Will this pipe rust?
MotoSport Staff
4 months 22 days ago Location: Portland, OR, USA
Yes, the raw finish pipes will rust if not maintained. The common practice is to use scotch-brite to keep the pipe clean and then coat it with WD-40 to prevent rust after washing. If yu are concerned with the extra maintenance you will want to purchase one of the coated exhaust systems such as the standard FMF Fatty. The performance between the FMF Factory Fatty and the Fatty are the same, only finishes are different .
Eric Over 5 months ago Location: Ireland
Will this fit 2012 & 2013 KTM65 sx?
MotoSport Staff
Over 5 months ago Location: Portland, OR, USA
Yes, the 2012 and 2013 KTM 65sx models use the same exhaust pipe.
1-4 of 4

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