Originally Posted by
cyclist2000
Raising the bars is not accomplished by loosening the large nut on the headset. for a threaded stem, it is accomplished by loosening the allen bolt at the top of the stem a few threads and tapping the bolt lightly (use a block of wood and hammer) the stem should then be loose. Raise to correct height and tighten bolt. Do not loosen the bolt completely otherwise the wedge or cone will be in the bottom of the fork and that will be another experience.
In addition, do not raise the stem so high that the "min. insert" or "max. extension" line is visible above the upper locknut of the headset.