I'm wth you on the one fuse question Jerry. I have a Vincent that was restored by one the best there is, especially on mechanicals and engine work. For electrical tho, he just does the one fuse routine. The bike had an intermittent short that no one could find, It resulted in the one fuse frying on pretty much every ride. So after all that investment the bike was still not useabe, it always came home in the back of a pickup truck. The PO took the bike to an electrical specialist Company, Automarine electric for testing. Because the short was intermittent, they found nothing wrong.
Twenty years after the complete resto was done, the owner finally gave up on the bike and sold it to me. He had put just 550 miles on it in twenty years. The current cost of the parts alone for the resto was 15 k.
I was told by those in the know that the problem was with the original Lucas dynamo. I replaced this with a new modern Alton, but the fuse problem persisted. Finally while riding at night with headlight on I spotted sparks flying around the Lucas pattern headlight switch. This grounding out would only occur with the headlight on and only at a certain RPM (vibration)
Because of the one fuse wiring, it was very tough to find the problem. If the lights had been wired with a separate fuse, as they are now, it would have been easy to track, and they bike would not be disabled by the short. I should point out that the PO would carry several extra fuses, but the end result was a dead battery and a pickup truck ride home. I guess he always attempted to ride with the headlight on, so the grounding out would happen on every ride.
So when I built the Special I used two six place fuse boxes and somehow managed to use up all but one circuit. Overkill maybe, but everything is separated so problems are easy to track and do not knock out other items. The other plus is of course the fuse protection for the individual items, forexample the GPS has it's own circuit with 5 amp fuse as required, so does the self cancelling Turnindicator module. With the one fuse wiring job, if something goes wrong, these components can easily fry as the single fuse needs to be large enough for the biggest combined load, much to large to offer protection to smaller load items.
Taking things even further, one other thing to consider the wire itself. A friend who builds hotrods uses wiring kits with labelled wiring. The name of circuit is printed on the insulation every two inches or so along the wire. I was able to wire te bike up using his leftovers.
If there are a lot of circuits onthe bike, thisis really nice, you have everything labelled everywhere on the bike. Even the circuit for the heated vest got an appropriate wire, it is "heater" , there are wires labelled left turn, right turn and so on.
Beats the heck out of the all black wiring that was on the one fuse bike!
Glen