86-91 top center mounts are identical except for the finish.
883 center mounts had a natural metal finish and 1100/1200s were black powder coat.

Both have a 3/8“ vertical hole near the left center end of the base plate to bolt the key switch cover (under) the motor mount.
883 had a 3/8” bolt for the key switch cover and 1100 / 1200 had a stud thru a horn bracket mounting the horn and switch cover to the motor mount.

Both have a 1/4“ hole through the back plate to bolt the VOES to the rear side of the mount.

Both have a slotted hole through both the “ears” that mount to each head for adjustment.

There is minimal welding on the back of the side plates that attach to the base of the mount.

Can be used on 92-94 models by drilling the 1/4” hole for the key switch or relocating the switch.

The same mount was used for 883 and 1200 models.

Has the 3/8“ hole on the center left of the base plate (no longer used for the key switch) for the horn bracket (1200).

Has a 2nd hole (1/4”) in the middle of the base plate for mounting the key switch cover on (top) of the motor mount.

Has a 1/4“ hole through the back plate to bolt the VOES to the rear side of the mount.

Has the slotted hole through both the “ears” that mount to each head for adjustment.

Has the same minimal welding on the back of the side plates (as in previous) that attach to the base of the mount.

Can be used on 86-94 models without altercations.