Carburetor KEIHIN NCV20 AR3 for Vespa LX / S / Primavera for Vespa LX / S / Primavera / Sprint 50cc, 4-stroke, AC, 4-valve engine connection: 28 mm, air filter connection: 38mm, main jet 72, secondary jet 35, incl. automatic choke If the carburetor is beyond repair, then it requires replacement with a new element. We have the original carburettors, equipped with PIAGGIO, for each Vespa model available in stock. The Keihin CVKs are used by PIAGGIO for all of their modern four-stroke Vespa engines. Conversely, they use DELLORTO PHVA carburetors for their modern two-stroke models. If the two-stroke has a different brand of carburetor originally fitted, the DELLORTO item is fully compatible for use. All carburettors are supplied fully assembled and include an electrically operated choke mechanism. SIP-TIP: Always use correct clamp size to secure carburetor between airbox and intake manifold. ### (for comparison purposes)