Hello!
I found these catalogues but they don't cover the model that I have:
https://www.scooterhelp.com/serial/VBC.VLB.VNC.parts.book.html
Mine is a 150 Super from '78 so it has significant differences in the engine assembly than the earlier models that is covered by the catalogue above.
Do you have any link for any parts book that covers my scooter model?