This is the shim found in most stock Vespa mopeds equipped with Dellorto SHA carburetors. This has an ID of 16mm and a OD of 18mm. This will fit SHA 12.10, 12.12, 13.13. This will not work in any carburetor SHA 14.9 and larger.
This is the shim found in most stock Vespa mopeds equipped with Dellorto SHA carburetors. This has an ID of 16mm and a OD of 18mm. This will fit SHA 12.10, 12.12, 13.13. This will not work in any carburetor SHA 14.9 and larger.