A couple of mods were done today. First off, I noticed petrol leaking from carb housing when fuel valve was open. As most of the gaskets in the carb was new, I suspected the petrol inlet gaskets to be the problem. (The petrol hose connects to a part which is screwed on to the carb, approx middle top in picture.
The large gasket was replaced with a plumber fairly same sized gasket, and the small one was just eliminated.
Second mod I did today was to shorten the petrol hose, approx 10 cm was cut off.
After rebuilding the carb and tank, the scooter was started. And yes! We have liftoff.