Originally Posted by Jonny042
Is the spanish fly spark arrestor "RMTA Legal?"
I run one on my Sherco 3.2 and RMTA has never questioned it.
There may be rangers at the event who will do a "stick" test, inserting a wooden dowel into the pipe to feel for a screen or turbine type spark arrestor. The rangers have never looked for the USFS stamp. They're pretty reasonable folks.