autojumbling today and amongst other things bought operating instructions for 242cc and 322cc anzani two stroke , rotary valve engines on the basis that i thought one or two micro's used them . surprised to find used by Norman,Cotton,Viscount two wheelers and Jarc,Astra Gill,Powerdrive,Fairthorpe,Berkeley,Manxcar and lastly Opperman ! Quite a list . ( total production figures for all combined would be Very few ) Were they any good cant think i've ever heard one .