Can anyone confirm for me that the four bushes that the swingarm rides on (the black bushings that fit into the swingarm, that the bearings ride on) are all identical?

They look the same to me, but when I mount the swingarm back up, I have a pretty big gap visible between the bushing and the swingarm. I gather this is normal, but it seems like a pretty big gap for dirt to get into.

Yes all four the same