2013 Fat Bob, when going faster than 35mph with a rear passenger, the rear wheel makes a very loud whining noise whenever there is no load (accel or decel). Either engaging the clutch or coasting is when you hear the sound. It's quite loud and gets louder the longer the ride. Seems louder on the right side. Just had the rear bearings replaced a week ago, but the sound is still happening.

 

Check your belt tension and rear wheel alignment.

 

Check to see if your brake rotor is rubbing on your caliper stay arm, like mine did.

 

Sounds like tension or alignment.
Who did your bearings? trustworthy? could be installed incorrectly.

Dave.

 

The bearing was just installed by Great South HD (Newnan, GA) to combat this same issue.
I will check the other items mentioned, and thanks a lot for the guidance.