A lot of mufflers have a small hole on the underside to let moisture drip out. I can't say I've seen that on Harley mufflers, but it's common on Jap bikes.
Sympathies to Old96. Been there, done that. 'Nuf said.....
Sorry. Going though a very tough time. Lost my grand daughter. Did not mean to take it out on you. Take care.
Very sorry to hear about your loss. My grand children are the light in my life, I would be devastated if I ever lost one. I can only imagine how difficult this must be, sincerely hope you get through this, we're good.