well.... we are are open to learn new stuff....
next question is.... and I am just asking... as real bikers don't read owners manuals....even if we have them... (giving the o/p a break, as he may have bought used, without one...)
Was the battery removed during the time it was in FSS... and if so, were all the connections, and grounding points, along with the battery terminals themselves, all Abrasively cleaned (actually scrubbed) and reattached prior to the key movement attempts...? Just asking, even tho I know it "shouldn't matter" as the bike's electronics are "turned off" in the FSS position... but...
asking just the same.
next step is to mallet whack the key, a couple times, after spritzing WD40 in the slot, and reinserting it, then turning it CCW from FSS thru "on to OFF" and what transpires...whack-a-mole...