I'm having a hard time trying to see in the pics where on the fairing/vent area you're speaking of, but just wondering, does the gap close up when you put the shield on & tighten up all the screws? I can't really tell on mine if there's a gap because the windshield is on, but IIRC, there is a slight gap between the two. Maybe pull your fairing back off & make sure there's nothing out of place under there that might be holding it from closing that gap up a bit more.
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2015 Denim Black RG, FM ss ceramic coated 2-1-2 pipe, White Bros Original E Series Mufflers, FM ac, PV Tuner