I think wind screens are a simple science. If its quieter when its on then its... Errrr , quieter.
Duck down to your tank and hear the difference.
I test rise a lot of BMWs with big electric adjustable screens. You can literally turn noise on and off with the switch and it usually is with a couple of inches in height.
Screens work... Bigger the better. Even if they look lame
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Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.
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