Usually with just a good cleaning they will be fine. If throttle spindle wear is very obvious - better to get another carb really - they are plentiful! The main agents these days are BURLEN - check their website.
I had a 30 year old pair of 1.25 HS2s from a Cooper S - cleaned them up (Carb cleaner from Poundland is excellent) - and they worked brilliantly without doing any work to them other than checking the float valves were sealing.