In a small bowl, combine soy sauce, agave, lime juice, oil, garlic, curry powder, ginger and black pepper; mix until well blended. Place pork tenderloins in a plastic bag; pour marinade over pork in bag. Close bag tightly; marinate in refrigerator for 1 hour or up to overnight.

Remove pork from marinade; reserve marinade. Grill over medium coals 20 to 25 minutes for medium doneness, turning after first 10 minutes. Meanwhile, place reserved marinade in a small saucepan. Bring to a boil; reduce heat and simmer 5 minutes. Serve with sliced pork; garnish with cilantro.