The spark arrestor on my 2019 Yamaha as clogged twice since we've owned it. I'm handy so I was able to remove the spark arrestor, clean it, and put it back on. It is basically a cap over the tailpipe with a mesh (held in place with a set screw). It looks like the mesh is getting clogged with muffler packing (looks almost like white cotton fiber) around the outer edges of the mesh.
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