Shep,
If you can't get a good adjustment on these adjustable jets, that suggests they are already plugged or sludged up and the best way to deal with them is to remove and clean them. There is any number of carburetor cleaners on the market which might work satisfactorily and may clean the jets and other carb passages when added to the fuel, but removing and cleaning the components in question gives the most immediate satisfaction.
When I did the carb on our CB125 project bike, I used toluene for cleaning (after the commercial carb cleaner was tried). That carb was a real mess inside and the toluene dissolved the crud quite well. I still have some and am willing to share. ...or it's probably available anywhere paint is sold - mine came from Home Depot.
I wouldn't suggest adding toluene to the fuel as I'm not sure what effect it may have on some non-metal parts (gaskets and O-rings).
If I can help, let me know.
Theo