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
- 3 Reviews
- 20 Questions
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.
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
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.