FMF Factory 4.1 Spark Arrestor Insert
FMF Factory 4.1 Spark Arrestor Insert

$26.99 $29.99
10% Off - Save $3.00

Description See Also: 3 Reviews 23 Questions Fitment Part Numbers
Item #FMF0001

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3 Reviews
4.8 out of 5 stars
5 Star   3 4 Star   1 3 Star   0 2 Star   0 1 Star   0
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All Reviews
Verified Purchaser
Ohio, USA
Durability 5/5 Ease of Installation 4/5 Performance 4/5 Power 4/5 Style 4/5
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
battle creek
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

Santa Maria, CA
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.

23 Questions
Answered:   21
Not Yet:   2
Location: Nc
Q: Ordered fmf without spark arrestor, can I put it on?
Over 11 months ago
I just ordered my fmf powercore 4 exhaust for my 02 Honda xr100, but when I ordered it I didn't realize I got the option without the spark arrestor. So I was wondering if I got this would I be able to just add it on myself? And if so how is it installed?
Location: McBain, MI 49657, USA
Q: I have a 2003 yz250f with stock exhaust?
1 year ago
im pretty sure i have stock exhaust on my yz250f will this fit it?
Location: Asheville, NC, USA
Q: Needing a factory spark arrestor setup or something that I can put in my factory muffler on my 09 crf 150f?
1 year ago
1 year ago
A: This will only fit the fmf factory 4.1 for most aftermarket pipes the manufacturer makes spark arrestors for it so whatever brand and model header you have that's the spark arestor you want to get for it
Location: Mission viej
Q: Will this fit?
1 year 1 month ago
I have a stock 2016 suzuki rmz450. Will this fit?
1 year ago
A: No it only works on the fmf factory 4.1 exhaust that only nothing else
1 year ago
A: No it will only fit the fmf factory 4.1
Q: Do I need to get 2 of these for my 4.1 dual system for 2013 crf 450?
2 years ago
Expert MotoSport Staff
2 years ago
A: Yes you would need two for the dual system. Feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
Q: Need a spark arrestor for a factory muffler?
2 years 9 months ago
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
MotoSport Staff Expert
2 years 9 months ago
A: 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
Location: l.a
Q: 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?
Over 3 years ago
I have a 2012 kx450. Fmf 4.1 r.c. t muffler
Top 50 Contributor Top 1 Contributor
Over 3 years ago
A: FMF makes a specific product for their RCT Muffler for your Kawasaki KX450F 2012 model.
Location: Colorado, USA
Q: Will this fit my bike?
Over 3 years ago
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 1 Contributor Top 50 Contributor
Over 3 years ago
A: 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.
Q: Will this work on my 08 crf 450 with a powercore 4 ?
Over 3 years ago
MotoSport Staff Expert
Over 3 years ago Location: Portland, OR, USA
A: No. This insert will only work with FMF Factory 4.1 Exhaust Systems.
Location: Colorado, USA
Q: Will this fit a Q4 for a DR 650?
Over 4 years ago
MotoSport Staff
Over 4 years ago Location: Portland, OR, USA
A: 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.
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# Part Numbers
Product Variant Manufacturer Part #
FMF Factory 4.1 Spark Arrestor Insert 040261
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