Just read through the thread and been through a similar problem with my Grandsons Honda VTX 1300 v-twin. it is a 2004 with 4,000 miles and is a beauty and had been sat for years. Cleaned the carb and new plugs and ran good for a few miles then sooted up the plugs and front cylinder cut out. ALWAYS front cyl. going bad changed front coil, checked plug wires resistance. replaced wiring from Ign.Control Module to front and rear coils fired it up and ran on both cylinders, put side panels on bike and seat and got ready to take it out and it wouldn't fire up. Just couldn't believe it. We checked the blade type fuses and found the ignition fuse blown, replaced it and all worked well and is still running strong. The fuse had "blown" but not how a blade fuse normally does. All blade fuses i have seen blown seem to shear across the top of the "U" or upside down "U" actually. This fuse looked like it had started to blow out on one side of the "U"but it still managed to somehow allow enough current to power the coils and as we kept trying to run the bike it allowed the leg to bend but as it did the leg got thinner. The thinner it got the more it got hot and "stretched " apart till it finally broke for good and not even one coil would fire. Then we finally found the culprit. A BAD FUSE, slowly blowing under load. It led me a right old song and dance as we say in England. Maybe just maybe you might be having the same issue. Checking all the connections in the fuse box may help.
