Wind management / bobblehead issue

[Lapchik]

As some of you might know, I have Bob Johnson's 1985 goldwing now. I'm noticing that at speeds above 50, the wind starts shaking my helmet around. Obviously gets worse with more speed.

I've tried sitting differently, but I'm just too tall. I tried taking the visor off my helmet, shield open, shield closed. Doesn't make any difference. Opening the dash vents helps, but doesn't eliminate it enough.

In the past I've had those add on spoilers to the windshield, and they work okay. I have a golf cart windshield that I could probably used to make one of those. That's the plan right now unless I find something better.

Just wondering if there's some other sort of solution out there to prevent the wind from slapping the helmet around. I know a lot of goldwings have some sort of event in the windshield. Is that stock or an aftermarket modification? Don't really want to drill holes in the windshield, unless I can also block them off in case of rain or very cold weather.

Any suggestions?