Since the Vespa T5 the rear hub oil seal has been internal (inside the engine) and a sealed rear hub bearing was fitted. VESPA PX 80 E Lusso/ EFL/ Arcobaleno / Elestart 80 V8X1T 2T AC `83-`90. VESPA PX200 E Lusso/ EFL/ Arcobaleno / Elestart 200 VSX1T 2T AC `83-`97.
The Vespa PX Rear Hub/ Rear Wheel Sealed Bearing - PX Disc, T5 & Classic, PX EFL product would find its best fit on Vespas, specifically the rear end components.