Exhaust too loud ;o(

Moin boys. I’d like to have a problem there.. Sounds funny, but so. I moved and my moped is standing in the underground garage with a narrow exit. In the morning two times at work and there had happened. Neighbors do themselves together and want to report, because Moped is too loud. With one the glasses inne showcase, with the other the bellows and so on. I want to build a exhaust for the sake of peace, which is a little quieter ;o) I would like my big radius to be quieter ;o) I have a FXST 96er EVO Softail . What could you recommend there ? Do not interfere with the green color, should be repainted possibly next winter. Greeting Ralf