Update: 9-March-2015
First of all, apologies for the slow progress. I have been busy with work and my long neglected KE70.
Also, no progress was made because I required the axle bearing retaining nut shown below. After much searching at various vespa parts dealer found one. The only one he had. What I found was that vespa mechanics machine out the threads on the casing and use a circlip instead.
