Preheat oven to 350 degrees F. Place ribs in a large roasting pan. Salt and pepper thoroughly and top with bacon and onions. In a medium bowl, combine ketchup, vinegar, Worcestershire sauce, brown sugar, pineapple, mango juice, liquid smoke and water. Pour sauce over ribs. Cover with foil, and bake for 2 1/2 to 3 hours. Finish off on the grill to caramelize the outside.