In a bowl, combine the first seven ingredients; set aside 2 tablespoons. Pour remaining marinade into a large resealable plastic bag. Add chicken, peppers and onions. Seal bag and turn to coat; refrigerate for 2 hours, turning occasionally.
Drain and discard marinade. In a nonstick skillet or wok, stir-fry chicken and vegetables in reserved marinade for 3-4 minutes or until chicken juices run clear. Spoon onto tortillas. Top with sour cream and salsa. Roll up.