Well, the problem has come back, and this time I took a deep breath and started trouble shooting before tearing into anything. Much the same symptoms as before, running really rough and smoking. The more it ran the worst it got. To the point it was backfiring and would not stay running. I finally tracked it down to a bad capacitor(brand new) on the points. Once it was replaced to ran like a top for about two days and started again, once again it was another bad capacitor. I do believe my old style electronic external voltage regulator has failed causing the caps to burn up. I replaced the VR with a old mechanical style one and another cap. Seems to be running great again, but I have been here a couple of times already. Is there any thing else I am missing that would fry the cap?