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

$26.99 $29.99
10% Off - Save $3.00
4.83 5 6
Rating: 4.8 out of 5 stars

Item #FMF0001

6 Reviews

4.8 out of 5 stars
  •   5 reviews
  •   1 reviews
  •   0 reviews
  •   0 reviews
  •   0 reviews

All Reviews

Kendal

Verified Purchaser
1 year 7 months ago Cranbrook,BC
5 out of 5 stars
Ease of Installation
5/5
Style
5/5
Exact fit. easy install

had to have a spark arrestor to satisfy Forest service requirement. this was an easy, relatively cheap fix.

Brent137s

Verified Purchaser
1 year 7 months ago San jose,ca
5 out of 5 stars
Durability
5/5
Ease of Installation
3/5
Performance
5/5
Power
5/5
Style
5/5
Does not fit a klx110l

Its a well build spark arrest and will work great on proper bike but dont buy if its for a fmf 4.1 on a klx110

Spry89

Verified Purchaser
Over 5 years ago Ohio, USA
5 out of 5 stars
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.

Zach

Verified Purchaser
Over 6 years ago
5 out of 5 stars
Durability
3/5
Ease of Installation
5/5
Performance
5/5
Power
5/5
Style
5/5

milocrf450

Over 9 years ago battle creek
5 out of 5 stars
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

g941

Over 12 years ago Santa Maria, CA
4 out of 5 stars
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.

28 Questions

  • Answered:   26
  • Not Yet:   2

Question asked by keegan

Question: Will this fit in a fmf power core shorty
Question asked Over 8 months ago
Question answered by Paul
User's contributor status: Top 10
Question answered Over 8 months ago
Answer: The FMF Factory 4.1 Spark Arrestor Insert fits only the FMF Factory 4.1 mufflers.

Question asked by elk wisher

Question: What is the diameter of the non-mesh part, where it goes into the silencer?
Question asked Over 10 months ago
Question answered by DaveGearhead
User's contributor status: Top 1
Question answered Over 10 months ago
Answer: We were not furnished the technical specs for this product. Please consult with FMF for their specs.

Question asked by BJ HONEYCUTT

Question: Hello, I have a 2009 stock kx450f. This looks like it will just slide right in the muffler. Will it fit ok?
Question asked Over 10 months ago
Question answered by Isaac
User's contributor status: Top 10
Question answered Over 10 months ago
Answer: This will not fit the stock exhaust.

Question asked by Gage

Question: Will it work for klx110l 2015 Fmf 4.1?
Question asked Over 11 months ago
Question answered by Paul
User's contributor status: Top 10
Question answered Over 11 months ago
Answer: Yes, we currently have the FMF Factory 4.1 Spark Arrestor Insert to fit the 2015 KLX100L with FMF 4.1 muffler on-hand, available to ship out immediately.

Question asked by Ryan

Question: What is the OD of the 2 flanges for this S/A? And is it physically stamped USFS?
Question asked 1 year 6 months ago
Question answered by Paul
User's contributor status: Top 10
Question answered 1 year 6 months ago
Answer: The FMF Factory 4.1 Spark Arrestor Insert is model specific and available in a variety of sizes to fit each particular FMF Factory 4.1 muffler.
To find the correct size, we will need to know the year, make, and model of your motorcycle, and which FMF muffler you have.
Question answered by Ride 177
User's contributor status:
Question answered 1 year 6 months ago
Answer: Yes it is stamped USFS approved. Face flange is 2 3/16" OD. Can't tell you what exact bore is, thinking around 1 7/8"OD(went in with block of wood and hammer, otherwise I would pull it out for exact OD) but the housing is 1 3/4" ID where the 2 screen holding pipes press in to it. Hope this helps.

Question asked by Josh

Question: Ordered fmf without spark arrestor, can I put it on?
Question asked 2 years 8 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?

Question asked by jess

Question: I have a 2003 yz250f with stock exhaust
Question asked 2 years 10 months ago
im pretty sure i have stock exhaust on my yz250f will this fit it?

Question asked by Gaddy

Question: Needing a factory spark arrestor setup or something that I can put in my factory muffler on my 09 crf 150f
Question asked 2 years 10 months ago
Question answered by Max26
User's contributor status:
Question answered 2 years 10 months ago
Answer: 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

Question asked by Bobo

Question: Will this fit?
Question asked 2 years 11 months ago
I have a stock 2016 suzuki rmz450. Will this fit?
Question answered by Max26
User's contributor status:
Question answered 2 years 11 months ago
Answer: No it will only fit the fmf factory 4.1
Question answered by Max26
User's contributor status:
Question answered 2 years 11 months ago
Answer: No it only works on the fmf factory 4.1 exhaust that only nothing else

Question asked by Braap

Question: Do I need to get 2 of these for my 4.1 dual system for 2013 crf 450?
Question asked Over 3 years ago
Question answered by MotoSportExpert
User's contributor status: Expert MotoSport Staff
Question answered Over 3 years ago
Answer: 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.
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# Part Numbers

Product Variant Manufacturer Part #
FMF Factory 4.1 Spark Arrestor Insert 040261

California Proposition 65

WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. Wash hands after handling. For more information, go to www.P65Warnings.ca.gov.