Could be that some sediment from the bottom of the fuel bowl got sucked into one of the jets or power valve when it went up and down that truck ramp during transit.
I’d remove the jet screws on the bowl and run a wire through both jets. If he’s got carb knowledge, remove the air horn and clean out the power valve and both slow jets.
I’d remove the jet screws on the bowl and run a wire through both jets. If he’s got carb knowledge, remove the air horn and clean out the power valve and both slow jets.