Mystery part

[kdaddy]

After a trip to Dallas and back from Nashville my 05 Electra glide needed a bath. I put it on the stand and gave it a thorough wash. When all finished I noticed this rubber grommet/spacer lying just beneath my voltage regulator. It's not any part of my front engine mount and I can't find anything missing anywhere. Does this look familiar to anyone. I am puzzled a
s to what this is. Could it be something I picked up along the way and just flushed off with the water hose?

 

[dbmg]

Rubber bumper up on one of the fork tube below fairing where forks start to go up in fairing...
While washing the water acted as a lubricant and it slid off...

 

[joel]

Also looks the the front tank mounting insulator.