I am sure that some of you have this information already but I thought I would share.
The OEM graphite exhaust "bearing" or gasket is an expensive little item to replace everytime you change a tire. I found these on eBay for only $12 and they fit perfectly. Make note of the Yamaha part numbers as a FYI just in case this listing goes away. It fit my bike perfectly and I saved some money over OEM.
Here is the link:
Part numbers for your reference:
YAMAHA 3YF-14714-00-00, 1JK-14714-00-00