Mine developed exactly the same, except I've got horn working. For some time one trick worked and that was to leave the high beam switch on until it worked. Now that doesn't work anymore. So far I've checked all the connectors under left and right fairing, including S6 which was cut and soldered together before me and looks fine. I haven't checked the S4 yet, but I think S4 connects to engine so the engine wouldn't run. I guess, I'm not sure. The worst part is my tank is full and it's a PIA to remove and refit when full.
Cheers mate know the bike won’t start I have checked everything s4 s6 rectifier starter wiring everything I have spent 10 hrs on it I don’t know so today it’s on a trailer heading for a auto electrician let’s see what he says will keep you informed about what the hell is wrong with it
