Appreciate the feedback Mylar and the devoted attention to Cdo flying ease. The question is merely winter bored academic to me, as once I spiffed up my two Combat they did not drift or wobble till going rather slow towards an intersection or stop. In searching reports of compensating for drift, even with hands on, the vast majority report drift left and all were d/t to some fault that others did not have on same type bikes and no drift complaints, Harleys' to sports bikes.
Cash I have the Service Notes but skipped 850 issues as I'm a 750 only dude. Do they explain why the switch? On this note I bet if the rotor had significant less mass it would be less issue on which side its mounted. I'm stuck with RH rotors on my Combats and do get a slight slow delayed LH drift that easy to compensate for hands off, but its about same on my dual rotor rigid frame SV650. So I thought its more universal innate road crown tire inter face issue than brake spin pushing it.