Unless you're riding in a hospital gown, I find it easier to block wind from the back side anyway cause there's no zippers, faceshields, or other openings save the helmet/ jacket neckline.
I've experimented with the wind wings and windshield height and find that up all the way and out all the way is the best cold weather protection.
I haven't taken the trunk off yet but was wondering whether it made a difference with the back draft. Would imagine I'd feel it even more.
Less though if my wife is back there blocking it.
1 Corinthians 15:57 But thanks be to God! He gives us the victory through our Lord Jesus Christ.
2009 Vision... Lloyd cams, pipes, timing wheel +4, power commander V, gps, xm, centramatics, DARKSIDE