Getting ready to clean the carbs which areas do I really need to get in and clean?

 

There is a stickey at the top of this area with Carb cleaning 101. I personally like to soak the carb in 80/20 Pine Sol and water overnight, rinse off with water, blow dry with compressed air, and then dissemble and spray carb cleaner in the small holes everywhere. Re-assemble, put back on bike, and sync.