Look at my pics. The collar is a straight shot all the way though. Flat inner walls. Yours has a flange all around the inside.
WAIT---that's because that is not the collar! That's your wheel! Look at the parts diagram. that is a part of the wheel sticking out at the hub of the wheel. There should be a bearing in that.
The collar you have circled in the diagram goes on top of the inner bearing that should have been in there. The outer bearings go against the other side of the collar.
You must have taken the bearings out. No way you could have run it with no bearings in the rear wheel.
I'm undecided if I'm missing a part or not. Is this circled part pressed into the hub?
No. It sits loose in the sprocket carrier.
I can't tell if this circled part is in there or not.
No it isn't. The collar is smaller than that protruding cylinder on the wheel hub.
The bike was missing the spacer between the three swing arm on the chain side so it wouldn't surprise me if someone left this out as well.
Yes. If there is no collar like what is shown in my pics, it was running without.
'08 MIDNIGHT SAPPHIRE BLUE Now Deceased