Spare bit after cleaning

[Nodrogmac]

Hi guys, I washed my bike the other day with a little more vigour than usual as it was particularly dirty. Anyway after cleaning drying polishing etc etc and putting the bike away I found a bit of rubber plug thing on the patio where the bike had been. I've had a quick look to see where it came from and even looked at the spare parts pictures to see if I can identify it but with no luck.
So before I get my reading glasses on, knee pads and a torch do any of you recognise this elusive bit? Photos attached hopefully.
Thanks in anticipation.

[Wilko]

Just a guess, but look where extra wing mirrors could be screwed in, by the reservoirs on the handle bars, it looks like a blanking plug.

[Coconut]

Mirror Blanking plug is a good call 

For information there is another rubber part on the Side Stand, and also on the Centre Stand
( to cushion and deaden the metal on metal noise when the stand is raised ),
which are easily dislodged when cleaning !

[Nodrogmac]

I agree with the blanking plug theory guys. I have a look as you both suggest tomorrow.

[trophied]

That's my best guess.

[Volfy]

Drain plug for the blinker fluid reservoir.

[AVI.INC]

It's definitely a muffler bearing

[Nodrogmac]

Wilko got it. After spending about 30 minutes scrabbling around on the floor looking up through my varifocals for a missing plug around the stands I thought I'd check the mirror theory. You know what, I didn't even know they were there. Thank you.