First, make sure there is no slack in the cable at the derailer when it is on the smallest cog. Then remember; trouble shifting to larger cogs, turn it counter clockwise. If the trouble is when shifting to smaller cogs, turn it clockwise. When you are close, small changes (1/16 turn) are in order to final it out. I find it easier to do this final tuning while riding, using the adjuster on the shifter. bk