>At a minimum, just one fuse on the hot side near the battery could prevent a little fire...
If I understand the US "hot" term correctly (the battery terminal not connected to the frame or chassis?), as I posted above, you're wiser to put a single or main fuse in the "cold" side, if the bike doesn't have an electric starter.
Reason is pretty-much any metal part of the bike is "cold" and, while it might not be intended they conduct electricity, any will given half a chance.
The usual scenario is something metal accidentally touching the battery "hot" terminal itself and any other "cold" metal part; in this case, "one fuse on the hot side near the battery" won't "prevent a little fire..." because the short-circuit isn't through it ... However, the short-circuit is through any wire between frame and battery terminal, wrecking its/their insulation in seconds, happily causing a fire if left for any length of time ...
If I've understood the US "hot" term correctly, any vehicle without an electric-start, 'main' (or single) fuse in the one-and-only wire connected to the "cold" battery terminal, lower-rated fuses protecting individual or groups of components somewhere in the wires between the the battery "hot" terminal and those individuals/groups.