Spark Arrester Guidelines

Forest Service approved spark arresters are required year round on Forest Service and BLM lands. Most approved spark arresters are stamped as such someplace on the unit. Just because it is "stock" does not make it legal. Motocross bikes do not come stock with spark arresters. If you have a motocross bike (for example RM, YZ, KX, SX, CR, etc.) please check it or risk being sent home or cited. If your silencer is stamped "Not For Road Use" or "For Closed Course Competition Only" or if you can stick a small rod all the way through the silencer, it is not a spark arrester.