There is not a stock way to do Bluetooth comms through the Harley system.
You can connect tunes from motorcycle to headset using sena or other brand- and you can do BT comms with connection between headset and phone.
For now, the only way to use BT to connect a headset and Harley for COMS is to do one of the mods with an Ake or sena adapter like CPT_Carrera posted recently.
Having BT connection for communication (cell, CB, or intercom) makes so much sense, I'm not sure I even expect Harley to offer the capability anytime soon- but, one can remain hopeful....
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