I have a later model A-4, and had very good luck with the rebuild kit from Moyer. As I recall new jets were included. Be careful as you remove them, as I recall a deep well socket was used to avoid breakage.
I agree with others that anything beyond solvent (such as manually reaming or cleaning the jets) will probably lead to other problems. Been there, done that, not going to do it again... Bob Wooden Rhapsody 27-3 _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com