Kickstarting technique?
https://www.youtube.com/watch?v=axOs4qRkob8
If, on the other hand, your technique is fine, it could be a downside of the spark delay unit incorporated in the later (green) TCI control box, intended to preserve the sprag clutch. It's possible that a misguided previous owner has fitted the SEPARATE spark delay unit (intended as a quick fix for the earlier black TCI boxes) IN ADDITION to the later green TCI. This probably wouldn't affect a starter motor with a healthy battery noticeably but could make kickstarting much harder with an extended delay.
Just a thought.
The Dell'Orto carbs on some Electra-Xs sush as Jojje's were PHF32s, these have an accelerator pump which squirts a little jet of petrol when you open the throttle.
A.