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I think the Arcadia is fashioned after a 755, with the elastomer mount welded to the seat stay. You are in England, Callum is in Scotland and has been playing with elastomers. Perhaps he can work with you on a replacement.Terry
Well!It's the same setup as I got on my 853 from 1993.Have a look in my gallery.What's the problem with getting elastomers for it?My 1992 252 had other "bumbers" and I did a conversion from the black rubber things to the yellow ones.My 952 still has the black ones.