So does it have a nasty burned electrical smell? If so it is shot. The plastic band at the bottom of the field looks to have melted and the internal cooling fan looks to have been blowing the blobs of molten material.
I found the parts unit I had - it was the box on top of all places.
After disassembly it looks like motor we need, size and shape-wise.
After then I became baffled...
The part number of the rotor is a cryptic 5BA45 BD12.
This vacuum unit has a date of 7-1962 written under it so it must be a rebuild. Model plate is missing, but is a toggle switch unit. Bearing plate is very old with the rivets in it, slotted screws holding it on. Bearings are surprisingly good.
Unit never had a fan on it. Motor ran great at 1.5A, no load. I wanted to test it with a fan under load, but could not..........
Any fan I tried would tighten down into the bearing plate and screws. I tried different bearing plate (newer), old fans, new fans, metal and plastic -- same issue. I removed the screws and it tightened into the plate.
This units shaft is shorter and has longer threads, so not sure what gives.
My 505 with 3A motor has a later metal fan on it, so I know it should work.
After an hour, I ran out of time and had to give up for the day.
The field was caked in dirt like my 505 was so could not see much in there.
At this point it does not look like this unit will fix the OP's Kirby. This motor is too questionable.
I do have a semi-complete 514 unit that I had hoped to restore some day. I will take a look at this over the weekend to see if I can learn anything else.
