windshield height and helmet contour

[harryson]

my windshield top end height is a little above my nose when i ride which is maximum), and the wind above 55 mph makes my helmet (fulmer 3/4) vibrate (so does my head), gave me bad headche after a ride today. then i tried my wife's full face pretty helmet (have to!), it was less vibration.
funny thing is i don't have this kind of problem with out windsheild, except have to hold on tight so the wind dont blow my skinny a@# away.

i wonder if anyone had encountered such problem share their experience.
thanks

[GeorgiaRoller]

I hear of guys complaining about this from time to time and I think about the only thing that you can do (short of getting a different size shield) is play around with the angle of it. You might be able to raise or lower your mounting brackets. Sometimes the smallest of adjustments when it comes to aerodynamics can make a huge difference.

I have a Memphis Shades Pop-Top which is 16" high, comes about to my nose as well and I have zero wind turbulance issues. You can always go with a taller replacement shield so that it comes up to your forehead and that would push the air up over your helmet completely.

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[Easy Rider]

Originally Posted by GeorgiaRoller

You can always go with a taller replacement shield so that it comes up to your forehead and that would push the air up over your helmet completely.

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Study what you have carefully and see if there really isn't some way to adjust it higher. I'm having the same problem. Without a helmet it's fine; with one it's a bear.