Original Vespa Spacer Ring - 12 x 18 x 3.5mm - LX / Sprint / Primavera - 842166

This ring goes between the camshaft gear and the camshaft bearing of the models mentioned (under the tab at the bottom of the page).

Don't mess around and use this original shim; it has exactly the right dimensions and is made of the right material. Just one parameter needs to be off, and you'll eventually damage your engine.