Well, I just pulled the top yoke off today to check the stearing head nut. All came apart very easily, about as easy as any other bike I've worked on. I easily got the lock nut loose, and the bottom nut was LESS THAN HAND TIGHT! And.. I did not have a wrench or socket to fit this nut.
So.. to finish this up for now, I put my floor jack under the bike and raised the front end just enough to take the weight off, then grabbed a pair of locking pliers I had and tightend the nut good and firm with them, then took a screw driver and hammer and pushed the nut another 1/8th of a turn or so.. then tightened the lock nut and put it all back together.
EXCEPT.. there is always a screw up. One of the rubber pieces that the ignition cover slides into had come off without me noticing. I, of course, noticed this AFTER I had the handlebars back on and adjusted to my liking. So, it all come back apart so I can put this little rubber washer back in.
Anway, after a short run, I still have a tiny amount of shake (probably not tight enough from not using an actual socket or wrench), but it's not nearly as bad as it was.