I wish it was that simple Norm.
Governor and all linkages disconnected, operating the throttle lever by hand. Wide open the motor is screaming fast enough to throw the conrod, and initially when throttle completely closed it was still running far too fast.
I took out the brass butterfly and soldered over the small airhole hoping the motor speed could be controlled by having the throttle nearly closed but it bogged down running rich. Then drilled a smaller than original hole in the butterfly which helped a bit but idle was erratic/unreliable.
I reckon the main jet is too large, hence wanting to remove it and reduce the size of the bore.
