I have been the whole route. When I bought the bike I had them put the tall Honda windscreen in with the air vent. Did a 2000 mile trip with it and buffeting beat the hell out me. So, I bought the tall Clearview with vent and the recurve. Exactly the same problem. Now I bought a tall Baggershield with vent. That seems to have done it but the bike is up for the winter and I haven't taken it on a long trip yet.

I know it's not my helmet, a Shoei X-14. It is a very slippery helmet and I have used it on other bikes satisfactory.