1996 Suzuki GSX-R 750 T "gs750 petcock" Questions

GS750 vacuum line to petcock acting weird. I have a 1977 GS750 and I know the vacuum line to operate the petcock goes on carb #3, but the problem is I've rebuild theses carbs like 10 times now. I have

...petcock rebuild kit now. any other ideas ? The breather tube may warrant re-jetting but not re-syncing. A ?very helpful? rating for this answer? Thanks! Hey man, I chopped a 79 gs750 and built my own ...

GS750. Was running ok. removed airfilter assembly and it wouldn't start, turns over, but only an occasional backfire. returned airfilter to original, ensured pcv hose and vacuum hose to fuel petcock .

gs750 the rpm hang at around 3,000, with the choke off. after 30 seconds or so the rpms slowly come down to 1200. the bike seems to be running really rich at idle (smells bad and burns your eyes to be