'84 CX650E that is evolving into a GL500
You might be able to look at the back of the fan with a good light and a mirror but you wouldn't need to remove the bolt for that....
It seems that those cracks in the fan hub are to be expected and may not be the cause of fan failure. This thread is interesting reading. Broken Fan BladesYes. Figured that out after cleaning up the area. How bad are the cracks in the fan and are replacement fans available.
I did think I did adequate research but I learned different. I wanted a new cap each for both bikes and a couple of spares (they were about 1/4 the price shipped directly from China as bought locally).Bob a little bit of part # research goes a long way before going to the store. Just saying. A rad cap is not rocket science even during covid. Why buy parts you know you dont want to use??