In a small bowl, combine salt, sesame oil, crushed red pepper flakes, ground ginger, garlic cloves, maple syrup, olive oil, green onion, soy sauce, and balsamic vinegar. Pour 1/4 cup marinade into a large resealable container. Add salmon; seal container and turn to coat salmon. Refrigerate for up to 30 minutes. Cover and refrigerate remaining marinade.
Drain salmon, discarding marinade in container. Place salmon, skin side down, on a greased grill rack. Grill, covered over high heat or broil 3-4 inches from the heat for 5-10 minutes or until fish flakes easily with a fork, basting occasionally with remaining marinade.
