1983 1.9 Coupe GT Carb - Acceleration Issues

[swiftly]

Hi, wondering if anyone has experienced a similar problem as below and possibly found a cure.
I am trying to solve a issue with the acceleration on a 1983 1.9 Coupe GT with a carburetor. The other week whilst out in the car it started to occasionally hesitate at around 3000rpm and would not rev any more, so turned around and went back home. Switched the engine off and restarted it 30 mins later and it started ok but a week later when I went to start it, it would just turn over. I had a friend come and have a look and the carb seemed dry so took the fuel pipe off to check fuel was pumping and it was pumping fuel to the carb. We then took the carb completely off the car and broke it down to give it a good clean, carb went back on the car today and it starts better than it ever has. The issue now is that there is a couple of seconds hesitation before the car will rev.
Any help / suggestions would be appreciated.

Thanks