Didn't check the vents. I always leave them open, but I could have closed one when wiping the dust off the fairing. I'd be OK if that's all it is. I have 3 windshields. OEM, 11" LRS and 10" LRS. Too much buffeting with OEM. Got 11" LRS. Like it, but not being able to touch the ground flat footed got annoying. Lowered the seat about 1 1/2. Needed shorter windshield so ordered the 10" LRS. While waiting for 10" put on OEM. After a couple of rides with OEM back on noticed front end shaking up and down at 70. For reference the vent/ fairing oscillates/ flutters up and down about 1/4 inch. Feel it in the bars and a bit in the floor boards. Put on new 10" LRS. Same symptoms.
I'm not a betting man, but if forced to I'd bet a broken belt in the tire. PS. Bike is stored on my J&S Jack Stand if it sits more than a week so doubt if its a flat spot from storage.
It's at the dealer. We're have some OK weather so I'm itching to get it back.
2017 Road Glide Special - Superior Blue
2011 Super Glide Custom, traded for RGS - Two Tone Blue