Circlip, Wrist Pin - VSX
A circlip or snap ring is a type of fastener consisting of a semi-flexible metal ring with open ends which can be snapped into place, into a machined groove on a dowel pin or other part to permit rotation but to prevent lateral movement.
This one is used for the vintage Vespa P200 VSX.
Not sure if this part will work on your bike? Need to determine the correct fit? Call 1-888-968-3772