If you neglect wing and insitnct, you miss the point of enenagram and you necessarly misuse it or in an imperfect way.
Of course since motivations have noting to do with the enneatype. Te enneatyp is a settle of propositions wich you perceive the world through. The instinctual variant is the big sector of life where we are instinctively specialised.Your motivations are constantly churning away inside you, regardless of how you choose to deal with them - you don't need the enneagram to tell you that.
Have you seen my link? It proves you wrong.