Modern Vespa

Hello everyone,
I have 2005 PX 125 e LUSSO.

I've had original flywheel but it was bad, it had half of it's fins broken off by previous owner (he fell).

After I've got the bike I've done some mods 177cc polini kit, polini filter, SIP road exhaust. I felt vibrations when idling and riding due to unbalanced flywheel and, to protect my bike I spent a lot of money on, I decided to buy new flywheel and chose SIP touren lighter flywheel (1900gr).

Right after installing it I've heard some sharp high pitched metallic sound (plink). It is not consistent, I hear it mostly when elestarting my bike and sometimes when I let go of gas, I hear some pops from exhaust and in that exact time the pop happens, I hear that same sound.

I heard the noise right after installing a lot more, but now after I've put some KM on it, it happens way less.

Has anyone had any experience with the same or slightly similar example?

Thank you for reading

Since the previous owner had a fall and hit the flywheel your crankshaft end could be bent and the noise is probably coming from the flywheel touching the stator or the cover…

Thanks for info, I've asked mechanics numerous times if the crankshaft is ok and they all said it was fine.
Regarding the noise, Im gonna remove the flywheel cover and test it that way and see if it is that or touching the stator.

Cover is easy to replace/modify so it doesnt touch it but how bad can it be if it is touching the stator? Do I need to adress that and what should I do?
Thanks