Instead of working in the dark, this is what I would do.
Go to the DOHC website.
The forum members probably have already done most of the homework 4 you.
IT has been done many times.
You are on the wrong forum really because most of the questions and answers on this forum are about the SOHC bikes not DOHC's.
When you adjust mixture screws COUNT how many turns out they are.
Don't just turn them.
Put a mark on the screw driver with a marking pen.
That bike should only need 1/4 turn richer than the stock setting.
Also stay on the same thread from now on.
We cannot go through all of your threads looking for all of the facts
and history as to what you have done in the past.
Give all of the facts on this thread.
Tell us what the stock jetting was and tell us if you changed any of the jets or needle positions.
Do not tell us you washed the bike or that you reset the valves. LOL...lol
The carbs are LAST . Every thing else must already be finished.
Stay on this thread. Your mind is jumping all around and your threads are jumping all around, and now you have taken the bike to the dealer and then you changed your mind and brought the bike home (smart move), and are also looking at a new bike. IT is hard to keep up with you.
Don't just "tinker" Have an organized approach and stick to a plan. Work the plan.
On a Roadstar Adventure.