Excellent info, as usual. I agree, the mixture screw adjustment is the most often overlooked of all the tuning jobs. All the other adjustments are either "on" or not. With the idle mixture, because of this mixture screw, one can fine tune the circuit within a gnat's ass. And as you pointed out, you can't just say... set it to so many turns out and it's done... far from it, that's only your rough starting place to fine tune.
I
will add, if you make any changes to your jetting (main or needle clip position), you will most likely need to go back and readjust the mixture screw (which is why they say to do this adjustment last) as the other components will have some affect on the idle mixture... that's what I've found, anyway, with my playing with the carbs.
Also, after you're done, check your carb sync.. they
may be off due to the rebalancing of the mixtures.
some pics of removing the caps for clarity...
Great Post, Vex!! Thanks for your contribution.
