ok, took the flywheel housing off and ran the motor, flywheel is running true, didn't put a gauge on it but I don't think there is a reason to, it is good, I did use the slow-motion camera again, the wobble in the coupler is obvious, the flywheel is true. I think if I had realized the coupler housing was cast aluminum, I wouldn't have been so concerned, regardless, the coupler needs to be replaced, I am thinking it was probably like this from the day it was made...haven't removed it yet, anything to watch out for or methods to get the new one mounted correctly and true to the centerline of the crank?
Thanks
Scott
