Preheat the grill to high. In a bowl, combine the maple syrup, butter, salt and pepper. Set aside.
Remove the first layer of husk from each ear of corn. Gently spread out the remaining husk leaves, remove the silk, and baste the corn with the maple-butter mixture. Pat the remaining husks back around the cob and wrap each in aluminum foil.
Place corn on the grill and close the cover. After four minutes, give the corn a quarter turn and close the cover. Repeat three times until all four sides have been grilled (at total of 16 minutes). Unwrap, remove husks and enjoy!