As for the bronze shim, refer to the photos taken my Matz in his post where he has disassembled the swing arm completely. Here is the link http://www.enfieldmotorcycles.com/forum/index.php/topic,16382.0.html#msg179505
That is a completely different swing arm. At least from what is on my 09 C-5. That has different ends on the pivot tube. Those black disks on the end appear to be grease retainers, and not thrust washers. Very similar to what you might see on a Honda CB.
Looking at it closer.... it does appear to have a brass thrust washer on the inside of the retainer. Matt, was there rubber ridges or grooves along the inside lip of that black disk ?
@Mattsx @GashouseMy C5 Swingarm DID NOT have those discs and Just to verify I checked the repair & the parts manual..neither of the manuals showed those 2 discs..