Started doing this toward the end of Thanksgiving weekend at the dunes. It slaps so loud I thought I broke a belt coming down a dune…took my cover off to swap the belt and the belt was fine.

Just changed weights and installed new rollers (flat spotted) and it’s still doing it. Not that I was expecting those changes to fix it..

Any ideas? It’s slapping the top inbetween the primary and secondary. Forward of the exhaust tube. It leaves a distinct belt mark there. Only on decel and less then 20 mph.

Sent from the dune in front of you