Even with a custom built exhaust, I still have a "drone" in my helmet (Shoei Neotec 2) at highway speed. My solution was to open the face shield a notch, it seems to help. It won't hurt to try it.
Thats what i did today, open a notch or 2 seems to help depending the wind. Seems like well sealed helmet are more prone to "drone" "resonance" noise, cheaper helmet makes wind noise and no resonance, what the heck.
Last edited by mandytuning; 02-21-2023 at 05:39 PM.