1997 EC250 No lights at all

[daolx12]

Hey !
I own an old 1998 EC250 since a few days and I am stuck into turning back the 12V on.
It seems like there is no rotor on the external generator, and I think one of the previous owner have replaced the flywheel for a more recent one.
I am thinking about adding a rotor on the existing flywheel but, I have no idea if it will be adaptable or not.
Here is the ducati R093 rotor I was thinking about :

https://www.allumage-electronique.fr...ue-ducati.html

Here is a picture of the ignition system on my bike if it can help :

https://cloud.atryo.fr/index.php/s/z9xpSc7HgBNm86w

The last option I see is replacing the entire "internal" ignition system for a recent one that can generate the power for the ignition and for the lights. But I have no idea if it will be adaptable or not.

Does any of you have an idea on the easiest way to solve this ?