Everything in the carb kit below should fit your carb (the pilot jet is 4mm shorter, but will still fit):
http://www.ebay.com/itm/73-74-HONDA-CR2 ... 0883003512Many of the other jets etc. can be found here:
https://jetsrus.com/a_jets_by_carbureto ... ection.htmRe stuck air screws, I've had fairly good luck using a small flat punch to repair screw slot damage, then heating the aluminum around the screw with a
propane torch (small flame, 30 seconds or less per attempt). The aluminum expands faster than the brass, breaking the corrosion bond. PB Blaster can help too, especially when sprayed on while the metal's still warm.
Ray