Took the new trike out Saturday for a 300 mile ride, came home and started washing the bugs off and found a loose hose clamp on the rear exhaust heat shield. While I was working on that I found something else rattling, did some investigating and found the rear exhaust flange was not bolted to the motor.
Looked a little closer and found the exhaust flange nuts sitting on top of the transmission.
Spoke with the Service Manager at the dealership this morning. He said these bolts are installed at the factory and are not on their checklist of items to check, they are now on his list of items to check.
Check your bike over and don't trust the dealership to find issues.