I had a similar issue with my 74 CB360,
Not reading the entire postings,
I had a bad connection on my rectifyer,but that is for converting the AC power out of the Stator to DC, but as far as trying to hot wire, Put a jumper wire from the + connection of the Bat---> to the other side of the starter selonoid, see of the motor turns over, or kick the SOB over, the electronics are fairly simple, and in my case, i didnt have a "extra fuse" in the headlight bucket.
other wise, you might have a bad key switch.... if that is the case, the ultimate hotwire kit includes 2 14guage wires, unplug the key switch from the socket up front, and jump the brown, pink, and yellow? havnt had to do this in a long time, ( a buddy would give the keys up when on a bender, so i hotwired and parked it down the road.) Either way there are 4 wires, 3 need to be connected, and the black one is the one u dont wanna eff with, shoot me a Pm and i will fork over the Honda Manual for the dirty bugger.