In article ,
says...


I stand on the shoulders of giants.


And they are groaning about the extraneous noise level in their ears!


"Power" is unrelated to the gyroscopic stability in the equation. Bicycles
travel a large propoortion of the time without application of power to either
wheel. That you would list power to the rear wheel as one of a set of two
exclusive conditions required for the bicycle to remain upright proves that you
haven't really looked at the question very closely, and neither have any
sources you may be quoting.

GF