Did you compare the jet size from the old carb? As far as checking the choke/enrichment valve, Take it out and supply 12 volts. It should slowly extend, if I remember correctly it only moves out about 1/4 inch. It can take a few minutes to fully extend.
So to be clear, with no power the choke is in the rich position/choke on. With 12 volts it will be in the lean position/choke off.
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