Hello everyone, Thanks Kranky for making a difficult explanation easy, I also thought that gravity could be a cause, in fact if we think about the balancing we do on the crankshaft, the weight of the vertical does not weigh on the horizontal cylinder.
As soon as I have a minute I will show you the photographs of my two damaged crankshafts, however I also had another technical problem, caused by multiple assemblies of Ducati parts of various types, in short, the right side cover dry clutch has compressed the casting where the oil pump spring is housed and has compromised the sliding of the oil pump pressure switch.
I hope you understand, otherwise ..... Kranky you have to say it