Best way,.. pull the floatbowl, pull the jet, and run a guitar string or thin wire of some kind through the jet orifice... might as well do the main as well as the piot while you're in there...
Then, spray some carb cleaner up into the jet seats... Cheapy stuff is as good as any... Pull the air cleaner and spray some into the carb from there to lube the slide as well...
If you haven't already,.. replace the floatbowl screws with allen heads... makes the job much easier next time...
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Some folks will say, "just put some Seafoam in the tank", but you will never be sure the jets aren't still partially clogged,.. and that will make you lean. Pull it, clean it,.. and you know for sure...
Seafoam or other additives have never worked for me...
Maybe as a preventative, but not a fix... waste of money in my book...