To adjust a Power Commander to eliminate a problem in a specific area,say an off-idle or mid-range stumble, you must use the Control Center Software.To find the RPM the problem occcurs at you'll need a tachometer. To determine the throttle position where the problem occurs, wrap a piece of masking tape around the throttle grip. With the Power Commander plugged into the computer, the Control Center Software open,and the bike turned on (but not running)you can view the "Throttle Position" scale on the screen. (The Warrior is an exception)Roll the throttle open and mark the tape to match each of the Throttle Position columns (10%,20%,40%,60%,80%). This done, ride the bike and duplicate the problem, noting what RPM and Throttle Position it occurs at. As examples, if a problem occurs between the 20-and 40% marks on the tape,and between 3000 and 3500 RPM, you would adjust the four cells that control that area. In other words,use more than one cell adjustment to cover an area that falls in-between the cells. Good Luck!