What difference does it make by either sending all electrical grounding wires to the battery negative post as oppose to grounding them to the frame?
As a trained electronic tech, frame grounding is one of those things that has always weirded me out about automotive wiring. I mean, if it's supposed to be a door panel, floor pan, front bumper or whatever, why would you want to have all those points tied to one of the battery terminals? Is it supposed to save money on wiring or what? Practically speaking, on cars I've owned, a lot of fuses got blown when wires came adrift and grounded themselves by mistake.
The galvanic action argument between copper and aluminum has some merit. Automobile connections used to fail when body panels rotted out.
I think the real reason for running separate power and ground leads has to do with correcting a system that was just plain wrong in the first place, however, since computers are now part of these bikes, having the ability to precisely control where signals and power flow is a very good idea.
This is speculation, mind you, but as a life-long tech, it just made fundamental sense to me when I discovered the Vstrom was wired the way it is.