MIX first 4 ingredients until sugar is dissolved; pour over chops in shallow dish. Turn chops over to evenly coat both sides of each chop. Refrigerate 1 hour to marinate.
MEANWHILE, mix remaining ingredients.
HEAT grill to medium-high heat. Remove chops from marinade; discard marinade. Grill chops 5 to 6 min. on each side or until done (160ºF), brushing occasionally with mayo mixture.