Place ribs on rack in a broiler pan 6 to 7 inches from heating element. Broil 2 minutes.
Place sugar in cheesecloth, and tie securely. Dip into vinegar. Rub cheesecloth bag over ribs several times. Continue broiling ribs 8 minutes, basting frequently. Turn ribs, and broil an additional 8 minutes, basting with sugar bag. Cut ribs into serving-size pieces.