There was a small batch of Casa Lambretta crankshafts with a M9 instead of the regular M10 thread at the flywheel side. This nut is exactly for that purpose made.
Product safety information
Manufacturer information:
Jockey's Boxenstop
Gewerbering 2
84326 Falkenberg
Deutschland
info@jockeys-boxenstop.de
https://www.jockeys-boxenstop.de