Merde, je viens de recevoir la réponse de l'usine:
Dear Mr. KEFRAN (j ai changé mon nom de famille )
The F4 AGO has been produced as a limited edition of 500 bikes.
This bike is out of production since year 2003.
As you can see in the technical specification paper in attachement to this
email, it's a 750 cc.
Kind Regards,
F4 AGO eng.pdf