Due to the design and function of carburetor linkage you might want to consider dry powdered graphite or similar as your lubricant? It will not attract 'dirt' and contaminants won't cling to it. It doesn't wash off to speak of but rather it tends to fill the microscopic pores in the metals. You may and probably do have slightly dis-similar metals in these joints, one just slightly softer and more porous, the cup side. The ball is super hard and less porous, less subject to wear.
Lubricants are spec'd according to the pressure or load exerted and what sort of film strength or suspension qualities are needed, at what temperature etc. With carb linkage stuff it's all fairly low pressure, low speed, light load and the main problem is simple metal to metal wear from contact. That's just the sort of application that powdered graphite is suitable for.
You'd probably have to figure on reapplication of powdered graphite or Dri-Slide at yearly intervals or during your major service routines. Fortunately it doesn't drip, run, spread out much or do what the last lube did, of leaving a useless nasty gunk all over the metal, doing far more harm than good.
The most difficult part with graphite is application, sorta wants to go everywhere. I'd let it do just that and leave the mess for a time until it gets pressed into the metal's pores, like a month or so of frequent riding? Then later it can be hosed and wiped off outer surfaces where it's not needed, also Q-tips help in cleaning up residues on linkage.
