I learned to ride a push bike and all i knew about steering it was, it worked the more i tried and i got better at it...........there was no dissecting the mathematics and applying those principles to understand and become better........Riding a motorcycle is no different to riding a push bike, the dynamics are the same, more traction when leaning back, less traction leaning forward, (good for wheel-spins on the push bike), more and less is the same for the steering, lean forward over the bars, and the steering becomes quicker and harder to control. 2 reasons, more weight on the front end giving the Tyre better grip and body position over the bars give less control of the arms........general descriptions, and holes can be found in the analogies in some of the positions outlined
This so called "little known issue" is something we all do, or we wouldn't be riding bikes...........It is Counter-steering..................(gggGary posted a good thread on this subject some time ago), we all learn it and we don't usually Analise it. Just a thing we do without thinking............ Positioning of the body and the aesthetics of a build will make the normal action we do, something to be re-Alineed, especially with the different positions of the body, seating, bars, and feet.
Having a jockey shift makes this harder again...........not because it is unsafe as such, it's because we didn't learn on it in the first place, so we have to relearn a different technique. Kinda like trying to do something with the hand you don't normally use..........difficult at first but with a little practice it becomes second nature...........Back in the 30's, 40's, 50's, jockey shifts were the norm more than the exception, so safety is relevant to how we learn........Is it dangerous? can be because we didn't learn that way but once it becomes second nature not so much. ............ ...i would give my right hand to be ambidextrous.............
An example is if in a situation of carrying a carton of beer on the tank, (im sure a lot of us can relate to this in our youth....Doesn't have to be beer, could be a number of things), and when it slides a little you grab it with one hand, because of the weight shift of the body, having to balance some of that weight with the hand on the bars, a wobble is a likely scenario. This is likely to happen because the normal counter-steering operation is interfered with.