thanks to all that responded, I'm still working on the pre ignition problem as time permitts. Bax, you response is to the point, run the durn thing without the cowl and see what happen's, this would be the first step. I still think I ran this puppy too lean, trying to squeeze more RPM out of it.
I'll keep you guy's posted on the final results of this problem, tomorrow is the first day of Deer Season here, so it probably will be Sunday before I get to the OS again. ( Trigger Finger is itching)

Buchtes