Have you checked the 7 volt regulator? They prone to fail. As for the neutral light staying on, the switch is probably gummed up. Try a good oil flush and use some Marval Mystery Oil in the crankcase, After a 100 miles or so it might resolve itself. Otherwise you'll have to pull the switch to clean it
There are plans around for building your own 7 volt regulator for the gauges. I think Randakk has a link to one.
Besides the neutral switch contacts gumming up - if the neutral light wire is grounded anywhere the light will stay on. I had a bare connector at the switch end and it was grounding to the block. Easy fix once I found it (and it took a while to find it).
There is a diode in the safety system (clutch switch and neutral light) that can fail and cause the neutral light to go on depending on the clutch switch. That failure doesn't happen often.
Thanks guys for the help, I guess while checking the voltage regulator I must have moved something just right, probably a ground, and they started working just fine. I will dig into the neutral light another day.