BSA Sunbeam scooter carb

[Steve4u2c]

Hi, i have a problem with the carb on my bike, i can get it to run a couple of revs by throwing fuel at the air intake but it wont run beyond that. I have taken the carb apart a couple of times & cleaned it to no avail.
Any ideas?
It has not run in years but i flushed out the old fuel & made sure new fuel is being delivered.