Jet size
 

Hello there I am in the process of getting a 1985 gpz 900r running properly . The previous owner bought it as a project , he had done a great job except he put individual carb filters on without rejecting. At first I thought it was a dirty jet issue so I replaced all of the jets ,, then I found out you need bigger than stock jets . I taped up each carb pod making an increasingly bigger hole in the tape until I had the bike running properly . So I want to just drill out my existing jets instead of buying new ones . What size are stage 3 main jets that come in upgrade kits and what size bit do I need ?
thankyou