most likely you will need to reclean that carb - sounds as if the power circuit is still dirty. make sure you clean out all orifices with thin copper wire and compressed air - us a magnifier to find all holes/ports - some can be small.

Agree with rcbe here. It is even likely that some bit of material may have migrated from the old fuel solenoid during the process of you swapping out the old solenoid for new, and lodged in the main jet or even beyond the main jet.
Usually, most junk that will pass through the main jet orifice will pass right on out of the carb and into the engine, causing no ill effects in the carb (or in the engine).
But, if the bit of crud is "long and skinny", it might not make the first turn of the drilled passages in the fuel circuits.
That is why a good carb cleaning involves probing all the passages with a small stiff wire (with jets removed) as well as dousing and flushing with spray carb cleaner.
Compressed air blown generously through all the holes and ports is a plus if you have it available.
Do you still have the old solenoid in your possession?
I don't remember the full details of you original post where we discussed this, so I don't remember if it was suggested that the plunger be cut off of the old solenoid (for test purposes) or not.
If not......and you still have the old solenoid......forcibly pull the plunger out of the solenoid with pliers (or cut it off with side cutters) and install the solenoid in the carb. Don't bother connecting the electric wire.....it won't matter for this test.
Try running the engine at wide open throttle now.
If the engine continues to act fuel starved....you have something blocking/clogging the main jet fuel circuit (you did remove the main jet when cleaning the carb, right?).
If, however...........the engine runs like a scalded dog with the old disabled solenoid in place.........there's something wrong with the new solenoid (somehow).
Post back please.