Well that sounds better. I thought it was still running hot because maybe you never said it wasn't.
Mysterious thing about the Boyer might be hot. If so it should also power the rest of the bike but maybe not. We're really curious about this particular problem. It's not a common thing with Airheads. I think.
Kai Ju's idea about the timing light will be easier than my idea about testing at the coils.
Glad you are finally getting to use the timing light we made you buy.
BTW, your R90/6 will blow your buddy's R75/5 away.