[mattsz]

Good!

Did you ever figure out what that large ring is, in your second photo?

[lemming]

Nope. It looks like a  dust seal for a bearing, but all of mine have theirs intact. A mystery.

[mattsz]

Could it have come from inside that black rubber bearing seal that looks so banged up in your first photo?

[Ducati Scotty]

I believe the exploded diagrams list the specs on the bearings and seals.  You should be able to get a new seal at any bearing supply shop for a few dollars.

Scott

[lemming]

It doesn't fit that rubber dust seal on the non drive side I pictured either. But yes, I think that rubber seal should be easier to source locally.

[mattsz]

lemming - I'm having trouble letting this one go!  Looking at that first pic again... that seal should be smooth and flat, and it just doesn't look it.  Was it installed backwards?

[lemming]

It hasn't been out since I have had the bike. I think that's wear from the 20 miles I ran without the spacer.

[gremlin]

........Attached is a pic of my wheel, installed.  You can see the axle end, snail adjuster, swing arm plate, black spacer, and small "silver" spacer, which has a flange......

much too clean ......  you really should ride more often !

[mattsz]

Sure it's clean!  I've had it all apart four times in the past two months...

[lemming]

While I had it off to change the tire, I got after my wheel with a rag. Boy, does it look better!

[JVS]

Damn! To be honest, I'm glad that the tyre/big metal spacer combo held up and you had to remove the tyre within a short period of time. Otherwise you would've kept riding, and who knows what might've happened! 

Just for reference, following is the detailed part list.

[mattsz]

Just for reference, following is the detailed part list.

Note that the small spacer discussed in the last few posts is not shown in that parts diagram...

[JVS]

Pooooooooop!

They skipped mentioning anything about that. The iron barrel parts manual does show it and it is referred to as the "rear hub distance collar".

bluesdaddy2 is correct: In the UCE owner's manual, there is a reference to the 'collar'. However, there is nothing about it in the UCE service/parts manual.. 

[mattsz]

[lemming]

Damn! To be honest, I'm glad that the tyre/big metal spacer combo held up and you had to remove the tyre within a short period of time. Otherwise you would've kept riding, and who knows what might've happened! 

So am I!