Ok guys, here's more info..
I spent the better part this morning on this issue. First, I double checked the tire pressure settings, twice, with two different guages. Then I double checked that all the suspension settings were at the factory standard settings. Then I spent two hours riding through all the turns I could find, trying to make it happen. Guess What?
I can make it happen, almost at will now. I've discovered the following;
The duration of the turn is irrelevant, I can get it in short 90* turns, or in long sweepers.
I can get it going either right of left.
Once it starts, I discovered that by holding a very steady throttle position, I could maintain the wobble/slap/oscillation as long as I wanted, even after getting the bike upright and riding in a straight line.
I can stop it immediately by getting on the throttle pretty enthusiastically.
If I try to fight it, and slow down, it makes it much worse.
It seems that it almost always starts when I am decelerating in to the turn. If I slow to below the corner speed, and accel thru the turn it never happened.
I wish I had a GoPro, I could go out and film it and be back with proof, in less that a half hour.
Help?
I do not trail brake, at all, ever. In fact, when I got it to happen consistently, I di all of my slowing in a straight line, using only compression.
, it occurs when under the specific envelope of conditions of loading, riding, and design that a harmonic (resonant) frequency exists. That really isn't an answer per se, but that is what the phenomenon is... a harmonic vibration. Changing the operating parameters should, in theory end it. This can be speeding up, slowing down, a change in body position, etc. Knowing how much to change or what to change is the problem. Getting it done fast enough to avoid a wreck is another problem. Then once you have gotten conditions outside of those that allow the harmonic, it can take some time for the vibration to damp down. 
