You could try finding sections where it's just the hihat, but that's quite rare...although often I have found sections of jaz records where it's just the bass and the hihat, and due to the two instruments [for the most part] occupying the opposite ends of the frequency spectrum, it is relatively easy to filter out one of the instruments.
I know I haven't really answered the question, but it wasn't all that clear - are you normalising the break before you chop out the hihat sounds, or are you chopping out individual hits then normalising them?
EQing the hihat afterwards might make it sound better, but not necessarily how you want it to sound.