Your bike would be a carby model ?,, you only have 02 sensors for efi

Plug up the holes, retune carby before worrying about jets etc. Google CV carby tuning there is a mile of info on how to do it, step by step, probably the easist  and most useful thing you will learn to do with the bike. When you follow the tuning instructions the bike will tell you if it wants bigger jets or not. Most likely not needed, tho no way of knowing who has done what over the years, part of the fun of learning as i am

Cheers