Dan,
Welcome to the forums.
I'm sure a number for the gang here would be willing to swap bikes with you for a season so you could check out your hypothesis.
Hint hint!!!
I haven't driven 2 up for a while. With the wife on the back though, there is no problem on the highway. In town driving's no problem so long as the passenger doesn't try to compensate on turns (inexperience). I find that the bike feels a bit more tippy at real slow speeds when loaded up with a squirming passenger (Probably true of any bike).
