Hi
I did some more tests and replaced the circuit breaker with one of 10 Amps.
First I repeated the short test on the first circuit breaker, but this time measured the current as well. It was about 100 Amps, again it didn't trip, so I think it's crap, because it was supposed to trip at about 47 Amps.
Next I tested three ETA circuit breakers, 10 Amps, 15 Amps and 20 Amps. They all tripped with the trip test. Then I did the load test with the 10 Amp, it didn't trip, and didn't get warm, so I assumed the others wouldn't. This time I remembered to include the horn. It's also good to think that all components will never be powered at the same time while riding anyway.
I haven't done the test ride as the weather is lousy, but I'm confident it's less than the load test.
Since it passed the load test and short test (test ride to come) I think I can now consider this as job done.
If there are any unwanted trips, it will be replaced with a 15 Amp.
Was I right in assuming this method covers all the unprotected wires except those to the starter relay and alternator/battery?