Glaze: In small saucepan over medium heat, combine hoisin sauce, honey, vinegar, ginger, and sesame oil. Bring to a simmer, stirring occasionally, and cook over low heat for 2-3 minutes to blend flavors. Remove from heat.
Season ribs with pepper. Grill indirectly over medium heat, turning halfway through. When ribs have cooked for one hour, remove from grill and cut between every other bone to make servings of 2-3 ribs. Return ribs to grill over indirect heat and baste every 15 minutes with hoisin glaze until meat is tender and begins to shrink from bones (15-30 additional minutes). Since the sugar content of the glaze is high, be sure to keep an eye on the ribs to prevent burning. Serve warm.