what are these for?

[SDkid]

I was working on cleaning my 2002 750 Dark i.e. today and noticed these little black rubber washer things between the heat-sink fins on the left side of my motor.  One came out before I realized they were free-floating between the fins, so I am curious about why they are there.  My service manual is in the mail, so I thought someone on here could give a solid explanation of what they are for (other than leaving ugly marks where they sit...).

[BCMonster]

anti vibration.

[zarn02]

anti vibration.

Yup.

The miniature hockey pucks are just vibration dampeners. Sometimes they fall out as "duc droppings." Nothing to worry about.

[64duc]

Yup.

The miniature hockey pucks are just vibration dampeners. Sometimes they fall out as "duc droppings." Nothing to worry about.

  Sometimes?   How about always, eventually.

[SDkid]

Ah, that makes sense.  Thanks for enlightening me.

[uclabiker06]

I thought they were sound dampers to help pass noise reg.  Anyways I removed most of mine.

[Bigbore4]

I thought they were sound dampers to help pass noise reg.  Anyways I removed most of mine.

Damps fin vibration.  Fin vibration = noise