DANGER DANGER DANGER !!! YOUR SWINGARM IS FULL OF FLAMABLE SPRAY FOAM ! THIS SWINGARM IS NOT TO BE USED AS A FLOATATION DEVICE !
do not throw your swingarm overboard in an attempt to rescue,it may strike the victim on the head and cause them to sink ,,,,,along with the swingarm .
it is full of flamable foam though,the hole you see was full of it ,,,to stop vibration maybe ? who knows ,,one thing i know for sure you will never EVER see one of these chromed .Polished yes ,,but a chrome shop would never put this in thier tanks and would take you the rest of your life to get it all out ,it's everywhere,mostly place you can't reach .