Agreed with the bearings not being is parallel planes as a likely cause, although the Raleigh type headsets are very sensitive to proper ball counts. Very much so.


One work around without being able to machine the cup and crown seats is to replace the lower stack of the headset with a more common, less radial contact, cup and cone set. The more angular ball contact of the common loose ball headsets (other then the English/Raleigh types) is more forgiving of miss aligned seats. I have done this with a few headsets over the years.


Of course we trust hat the steerer's straightness has been established first. Andy