That’s not the article I remember reading as in the case I read the experimenter mounted the (contacting, oppositely rotating) wheels on axes parallel to the front and rear wheels thus exactly cancelling the angular momentum vectors (?), been a long time), resulting in an unrideable bike advice.
In any case tho I didn’t wade thru the whole article the author points out the very pronounced
effect of gyroscopic procession esp. on heavy, stable bikes (motorcycles) at speed. All
experienced riders know that a heading change is effected by imparting a usually small force to the handlebar on the side toward which the rider wishes to turn resulting in an immediate
canting of the bike toward that side and a similtaneous steering wheel heading chg in the same direction, all caused by forced gyroscopic procession. I can
remember speeding across the desert lying more or less supine and effecting heading changes by shifting my body’s mass ctr a little, one way or the other.
