This is a factory tool you wedge between the webs of the crankshaft before you install the flywheel side bearing on a Vespa P, PX, or Stella crank. It protects the crank from warping or becoming unbalanced as you hammer at it.
Tool (Crankshaft Wedge); Vespa P/PX, Genuine Stella 2T
Vintage Vespa Tools
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