Probably just a transposition, but the correct Code No. for the part is 852.5.024.1A and the description is Gasket th.1.Thanks Jeff. Mystery solved. Apparently there is a typo on the Ducati fiche that lists the incorrect part number. The one listed is 85204241A. It is too small at 10mmX14mmX1mm. The one needed is 85250421A which is 12.2mmX18mmX1.5mm.