You only need to flip your chicken a few minutes before it is done. Then, baste your chicken or add sauce or whatever you are planning to put on it before flipping it over with the skin down. Please place it in a hot area of the grill to sear the skin to let it crisp up. You want the skin to get seared. You can turn it several times in different directions to get sear marks if you like but do not leave it long enough to burn.