The low pressure of the typhoon system caused the pressure in the fuel tank to drop.
Perhaps a faulty fuel tank breather only allows air to escape the tank, and not re-enter.
So after the typhoon, the pressure in the tank remained low and this is preventing fuel from running into the carb float bowls.
OK, that is a bit of a long shot,...
,.. but might have a slim chance of being true?
It sounds like a lean condition to me.
Either there is an air leak downstream of the carbs or fuel is not getting into the float bowl rapidly enough.
Check that fuel flows freely out of the fuel tap and into the carbs.
Check the inlet manifold rubbers for leaks and that the boost bottle 'thing' is plugged into the rubbers properly.
Check the downstream hose clamps are sealing the carbs well.
If none of that works then maybe check the float levels and give the carbs a good clean out.
Maybe if there is an inline fuel filter, check it is not restricting fuel flow.
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[color=#808080][size=9]Yes,.. I too know how to waste Time and Money,...