Might want to search around here for the Honda Carb theory/information PDF
Its a great read that will help you understand what a carb is and how it works.
I know that everyone has to start some place, but you might be in over your head to tune these. You should find someone local that can help you. You will need two to four complete sets of jets, and a dyno to do the job right. I would expect to spend as much tuning if not more then what the carbs cost.