Well I finally got a round to installing a new headlamp and bucket from DRATV. When I ran the bike (1978) it did not run well at all. Missing, sputtering, popping all that. So I took out the bulb and the bike runs just great. So is it the rectifier?. You already know I bet. I could have done a search but the rectifier thread is one long puppy. Anyhow, I have a new Radio Shack one (I already swapped on the K-1. But I never installed it on the 78' because it rand so well, I thought I would leave well enough alone.....am I due for a new rectifier, if the only thing causing my mis-fire is a head lamp?