I liked the stock silencer, but needed a spark arrestor. This ProCircuit screen fits perfectly inside the stock unit, and is USDA approved. However - that fact is not stamped on the unit (and may be a requirement in your riding area).
Drill a couple of holes and add screws to fasten the screen to the exhaust, and you're good to go!
Jeff
Part no. PC4000-004, $19.95.
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