Touring classics recomended the 1" bore. I am running an 8" dual diaphram booster for the time being. I have a hydroboost on the shelf. They reccomended an 1 1/8" with the hydroboost.
I know that washing and waxing my car with the present condtion of my paint is like polishing a turd.....but it's my turd and I want it polished!