OEM Numbers (for the purpose of comparison) 012787 - 012789 - S.12789 (PIAGGIO), SF504-1030 - SF504-1112 (LML), DIN 94 / ISO 1234 (DIN / ISO Norm). Cotter Pin brake drum, Front & rear. VESPA PX 80 E Lusso/ EFL/ Arcobaleno / Elestart 80 V8X1T 2T AC `83-`90.