Same thing happened to me on my 95 2 weeks ago :| Same side too!
I was able to wedge a flatend screwdrive with about a 45 degree angle on the end of it against the tank and nut-sert, then used a impact gun on it and it broke loose.
I was on the phone with Jeff Fredette about something else and asked him if it happened often, he said yes and just don't put it back in since the shrouds bolts help hold it all on, he said it wouldn't go anywhere! But, I noticed my right one is starting to do the same thing! :think: Not sure if I should take the chance and ride with both if them out! Major bummer!