1982 gs 750 cafe racer build problem

[Guest]

no matter what i do i cant get number 2 cylinder to run richer? had no problem adjusting other 3 cylinders any ideas?

[tom203]

no matter what i do i cant get number 2 cylinder to run richer? had no problem adjusting other 3 cylinders any ideas?

#2 being second from left as you sit on bike? You're trying to get it richer at idle with mixture screw? or someother rpm?
Is petcock vac line connected or blocked off?

[django89]

Yea its blocked off and I'm trying to.use the mixture screw the plug is still white

[tom203]

Likely means the idle fuel passages are clogged in that carb-this assumes that the tip of mixture screw has not broken off and is plugging the hole in carb throat. I'd probably pull carbs, remove/inspect that mixture screw , blow gumout down there,reinstall and see if things improve.