The carbs are not difficult to rebuild. The carb kits with gaskets and o-rings, as well as the jets, float needles and seats are still available. I would suggest buying a Clymer manual for the bike, also still available, and taking pictures while you do it for reference when you reassemble. I picked up the carb kits along with new float needles and seats for $100, but they can be had for much cheaper. I just went to the Honda dealer for convenience.
I boiled the carb bodies in lemon juice. I used carb cleaner (spray and soak) for the small parts. Piano wire or an \