The Pinasco carburetor VRX-R 28 with Venturi admission has
been developed to optimize the performance of Pinasco carburetor
SI 28mm for Vespa. The Venturi item 25530451 has been
calculated to increase the air volume sucked by carburetor and
the performance increasing is considerable at low RPM.
recommends fitting the carburetor VRX-R 28 together with