Originally Posted by
wkatastrof
when the headset is adjusted to not have any play, the headset binds when turning the bars/wheel to the left 70 degrees (if straight ahead is 90).
If you're certain that the cups and crown race are fully and properly seated, that behavior is usually an indication that the head tube faces and/or the fork crown race seat are not perfectly parallel. The fix is to mill the head tube and/or fork crown race seat so that they are all parallel.