Thank you for a detailed explanation! Makes sense now. Scary thinking about it, not being in control. Hope it never happens to anyone.There are a lot of things that contribute, no single thing. And it's doesn't just come on at high speed, my 70's H2 came on as low as 70kmh.
Wobbles start when the front and rear wheels become out of line - wheelie, slip/slide, or from unequal forces like rut [FONT="]or some irregularity in the pavement, loss of traction front or back. [/FONT]Poorly maintained or damaged steering bearings, suspension, rims, tires or brakes can also start or a wobble.
In a wobble, the wheels try to get back to center, forces move it past center then the same forces try to bring it back in an oscillating pattern. Dampers interfere with the harmonics, so any wobble ends fast. You can't muscle out (the squid in the video tried), best to roll off the throttle, easy on brakes, and hold on tight and hope for straight road.
Those of us who learned to ride on bikes built before 1980 probably got the thrill at least once. Today's bikes are better designed although it still does happen in certain circumstances.