Richard
Let me see... 14.23 volts are idle is a problem. It should be around 12. Have you checked you voltmeter lately? Can it be out of cal? I'd put it on your car battery (not running) and see... you should get around 12 volts. If so, it's accurate, and you have a problem. Yes, the regulator would be the most probable cause. You can test it once you remove the alternator, the cover, and the regulator (I just had to last month). Probably be able to find an alternator cheap on ebay... the aftermarket regulator is $80. You mentioned "per service manual specs", so I'm figuring you have one, and you can find the check method there. Before you head in and remove the alternator, there is a connector behind the starter solenoid. Disconnect it and take a voltage reading with the bike running; I believe the procedure and specs are in the manual.
Steam wafting from the "Front" of the bike. Are you sure it was electrical, and not coolant? When they leak coolant they steam... if it's electrical, you'd think it'da taken a fuse, but as I say in the medical equipment repair field of 27 yrs, "a $450,000 x-ray unit protects a $0.29 fuse". And if it is shorting... well, wondering if that is why the voltage output is up? I mean, I doubt it, but I also wonder if a short is lowering the battery and the alternator is trying to make it up??
Carb wise, drain them into a clean container. Tube on the nipple on the float bowl, good tool to loosen the drain screw on the bowl. Odds are carb #3 will have crap in it, as it is the first after the feed fuel line. Drain'm all though. Then put it on prime for about 30 sec, not letting go of the petcock... then back to on. Not letting go is a means of not walking away and forgetting to turn it from prime.
I'd rule out one thing at a time. Yes, your actual problem might be affecting the other things. Also, remove the air filter and look in the housing. Want to rule out a rodent moved in.
Mark