[DMcBiker]

I bought this helmet primarily to see if it would help with buffeting at highway speeds. Short answer is yes, it’s the best helmet I’ve ever had on….But there is a catch. With the visor down this helmet is Very quiet and buffeting is greatly reduced, I even changed from the Madstad to a 13in Long Ride shield and Buffeting was still manageable. The Catch…if you open the C3 Pro visor even 1 notch, buffeting returns, to a lessor degree than my HJC Modular, but still a modest amount of buffeting with the visor open. I like to ride with the visor open to increase airflow on hot summer days. The C3 Pro does have great venting, but weather it’s enough for hot weather only time will tell. The other great plus to this helmet is the optical clarity of the visor and the drop-down sun visor. Zero distortion or reflection from either one. The C3 is also a very light weight modular helmet.
Bottom Line, I’m keeping my C3 Pro and if you want a helmet that will reduce buffeting, this is the helmet to try. Expensive, Hell yes, worth it?? I think so.

 

[DMcBiker]

I have the Harley headsets as well, I tried once to install it on my C3 Pro but no luck. The Harley speakers are just too thick to install comfortably in the Scheburth. I got them in....but it was a VERY tight fit and caused too much pressure on both sides of my head. I'm thinking of carving out some of the Helmet foam to better make room for the Harley speakers.
Problem #2 the Harley helmet mount really didn't fit the Scheburth that well, I will try it again with double stick tape.
Your other option is a J & M custom install for $300 You ship them your Helmet and they will custom fit their Harley headset into your Helmet.