FMF Factory 4.1 Spark Arrestor Insert

$29.99
4.80 out of 5 stars
 
FMF Factory 4.1 Spark Arrestor Insert
FMF Factory 4.1 Spark Arrestor Insert
  • Description
  • Reviews (4)
  • Q&A (18)
  • Fitment

FMF Racing was started in 1973 by owner and founder Don Emler in a garage in Hawthorne, CA. Flash forward almost 40 years later where Uncle Donnie is still as hands-on as ever building the latest in performance in their state-of-the-art factory.

  • Replacement spark arrestor for FMF Factory 4.1 and 4C exhaust.
  • Note: If purchasing a Spark Arrestor Insert for CRF250R FMF Factory 4.1 Dual Exhaust, you must purchase the FMF Titanium Powercore S/A Insert. The Factory 4.1 Spark Arrestor will not work with the Factory 4.1 Dual Exhaust.
  • Note: NOT compatible with FMF Mini Factory 4.1 Exhaust.
4.8 out of 5 stars (4)
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1-3 of 4
Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Ohio, USA
Spry89
2007 YZ250F Spark Arrestor

Needed this to ride down at Hatfield Mccoy. Mildly changes the sound of bike but barely noticeable. Had to file the screw hole on the arrestor to fit the screw into the original hole that is on the exhaust. No big deal. It fits and it works for intended use.. no complaints.

FMF Factory 4.1 Spark Arrestor Insert
Overall 5 out of 5 stars
Location: battle creek
milocrf450
Very easy to install

bought this spark arrestor insert because I needed it for a trip to the sliver lake sand dunes. It was a very fast install which was one bolt and it worked great all weekend. Good buy

Overall 4 out of 5 stars
Location: Santa Maria, CA
g941
Great purchase

The FMF spark arrestor was very simple to install, just had to unscrew a bolt in the end of the silencer and install the spark arrestor and screw the bolt back on. Very simple, and it made my bike legal for enduro competition.

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Total Questions (18)
Questions with answers:
  18
Questions without answers:
0
hart Location: l.a
Josh7777 Location: Colorado, USA
desimir777 Location: Colorado, USA
1-10 of 18
alen 3 months 21 days ago
Need a spark arrestor for a factory muffler?
hello my bike is a honda 2004 xr250r. factory pipe i need a spark arrestor for the factory pipe, which one or ones will fit? thank you alen
Expert MotoSport Staff
3 months 21 days ago
MotoSportExpert
You can find the stock spark arrestor for your 2004 Honda XR250R in our OEM section here: http://www.motosport.com/dirtbike/oem-parts/honda/2004/xr250r/muffler
hart Over 11 months ago Location: l.a
Will this fit a 4.1 r.c.t. muffler. The pic shown looks like a power core bolt in. The fmf r.c.t spark screen clips in with a circular clip. There is?
I have a 2012 kx450. Fmf 4.1 r.c. t muffler
Top 50 Contributor Top 1 Contributor
Over 10 months ago
MotoSportExpert
FMF makes a specific product for their RCT Muffler for your Kawasaki KX450F 2012 model.
Josh7777 Over 11 months ago Location: Colorado, USA
Will this fit my bike?
I have a 2006 yz250F it has FMF power bomb header and an unknown slip on muffler, Im hoping it is FMF or factory. any way to tell? need a spark arrester so I can register it. thanks
Top 50 Contributor Top 1 Contributor
Over 10 months ago
MotoSportExpert
The FMF Factory 4.1 Spark Arrestor insert is only designed to work with the FMF 4.1 exhaust systems. It will not work with the OEM 2006 YZ250F Yamaha or a different brand of exhaust system.
landfill 1 year 5 months ago
Will this work on my 08 crf 450 with a powercore 4 ?
MotoSport Staff Expert
1 year 5 months ago Location: Portland, OR, USA
MotoSportRyanT
No. This insert will only work with FMF Factory 4.1 Exhaust Systems.
Steve 1 year 12 months ago Location: Colorado, USA
Will this fit a Q4 for a DR 650?
MotoSport Staff
1 year 11 months ago Location: Portland, OR, USA
MotoSportExpert
Unfortunately this will not fit the FMF Q4 mufflers. It is only designed 4.1 model mufflers. For the Q4, you need the SA quite core insert.
desimir777 2 years 1 month ago Location: Colorado, USA
Is it gonna fit on my 2011 ktm 250sx-f?
MotoSport Staff
2 years 1 month ago Location: Portland, OR, USA
MotoSportExpert
This will only fit your 2011 KTM 250sx-f, if you already have an FMF4.1 muffler installed. This will not fit a stock exhaust. If you have the stock exhaust and need to add a spark arrestor, you will need a Pro Moto Billet end cap that comes with the spark arrestor. Please make sure to profile your bike, so you receive the correct items specific to your bike for proper fitment.
Moto338 2 years 4 months ago
I was wondering if there is a spark arrestor for a stock exhaust on my 07 CRF450R?
MotoSport Staff
2 years 4 months ago Location: Portland, OR, USA
MotoSportExpert
To install a spark arrestor you would need to install a Pro Moto Billet end cap which does include a spark arrestor.
DDBZZ Over 5 years ago
Will the insert fit in a factory fmf shorty? for a honda cr125?
Expert MotoSport Staff
Over 5 years ago
hondarob
no it is for four strokes
sbjguk Over 5 years ago
What is the outside diameter?
Expert MotoSport Staff
Over 5 years ago Location: Portland
MotoMoo2
This is designed to work in the FMF Factory 4.1 muffler. If you need further dimensions please contact FMF.
Zacky Over 5 years ago
Can I do this?
Can i put this in a factory 4.1c (Carbon Fiber) Exhaust?
MotoSport Staff Expert
Over 5 years ago Location: Portland
MotoMoo2
This should fit without modification to your FMF Factory 4.1 exhaust.
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