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1984 Yamaha XT250

FMF Factory 4.1 Spark Arrestor Insert

$29.99
Free 3-day express shipping
On orders over $49. Shipping Info
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FITS: 1984 Yamaha XT250 change
 
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FMF Factory 4.1 Spark Arrestor Insert - Main

Product Description

  • 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 without that part.
  • Note: NOT compatible with FMF Mini Factory 4.1 Exhaust.
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(3)
4.7 out of 5 stars
5 star   2
4 star   1
3 star 0
2 star 0
1 star 0
1-2 of 3
Overall
Location: 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

Overall
Location: 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.

1-2 of 3
1-10 of 15
landfill 20 days ago
Will this work on my 08 crf 450 with a powercore 4 ?
MotoSport Staff Expert
20 days ago Location: Portland, OR, USA
No. This insert will only work with FMF Factory 4.1 Exhaust Systems.
Steve Over 7 months ago Location: Colorado, USA
Will this fit a Q4 for a DR 650?
MotoSport Staff
Over 7 months ago Location: Portland, OR, USA
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 Over 9 months ago Location: Colorado, USA
Is it gonna fit on my 2011 ktm 250sx-f?
MotoSport Staff
Over 9 months ago Location: Portland, OR, USA
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 Over 11 months ago
I was wondering if there is a spark arrestor for a stock exhaust on my 07 CRF450R?
MotoSport Staff
Over 11 months ago Location: Portland, OR, USA
To install a spark arrestor you would need to install a Pro Moto Billet end cap which does include a spark arrestor.
DDBZZ Over 4 years ago
Will the insert fit in a factory fmf shorty? for a honda cr125?
Expert MotoSport Staff
Over 3 years ago
no it is for four strokes
sbjguk Over 4 years ago
What is the outside diameter?
MotoSport Staff Expert
Over 3 years ago Location: Portland
This is designed to work in the FMF Factory 4.1 muffler. If you need further dimensions please contact FMF.
Zacky Over 4 years ago
Can I do this?
Can i put this in a factory 4.1c (Carbon Fiber) Exhaust?
Expert MotoSport Staff
Over 3 years ago Location: Portland
This should fit without modification to your FMF Factory 4.1 exhaust.
DazednConfused Over 4 years ago
How do you install this on the 4.1 slip on?
MotoSport Staff
Over 4 years ago Location: P+RTLAND
There is a set screw holding the insert in the outlet of your exhaust, just remove the screw, pull the insert out, put the screen in and then the set screw to hold it in place. It's pretty straight forward.
S8south Over 4 years ago Location: Vermont
Where can I find the insert to silence my FMF 4.1 cause I cant find it on this website and I went to theirs and they dont have anything like that..?
MotoSport Staff Expert
Over 4 years ago Location: USA
With FMF packaging all of their pipes with the 94dB insert, we don't stock that item. you can contact our sales guys and we can special order one for you.
S8south Over 4 years ago Location: Vermont
Will this lower the noise on my YZ450F with the FMF 4.1 slip on?
Over 4 years ago Location: keify
it will a little. FMF makes a insert now that really m,akes them quiet
Top 1000 Contributor
Over 4 years ago
This will lower the noise on your bike if it already doesnt have one in it.
1-10 of 15

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