H-D used to talk to customers directly. Perhaps they still do, or via HOG. If you have a really bad dealer it might be worth a try.
That is what I had to do to convince my dealer that a Tri-Glide should be able to start in gear. They insisted that it should never start while in gear even with the clutch in with a brake activated.
I called the HD corporate office and in their menu they have a customer service option. Got a lady on the line and explained the situation, she put me on hold for a minute to go talk to a Tech and when she came back she had confirmed that I was correct.
I asked her how was I going to relay this to the dealer, she told me to call my dealer and give them a reference number that she supplied and have them call corporate with it and they would straighten out the problem.
Found out later from both the Service and Sales managers that the entire dealership had meetings about how I was treated (as they did not believe what I had told them and I had to call corporate to convince them) and that Trikes should start in gear.
HD corporate customer service is there to help.
Bob