Intake manifold - Membrane intake manifold -LTH- Vespa VNA,VNB, VBB, VBC, GT, GTR, Sprint, Rally, PX, Cosa - Membrane under SI carburetor

OEM diaphragm intake manifold under SI carburetor for Vespa Largeframe

CNC milled diaphragm box for mounting under the carburetor sump. Replaces the crankshaft-controlled rotary slide valve intake. Suitable for all Vespa largeframe engines with rotary slide control (Dell'Orto SI carburettor) from approx. 1962 onwards. Ideal for reusing engine housings with a defective rotary intake slide. Adapting the engine housing to the intake manifold increases traction and performance. Supplied with gaskets and 2 long M7 stud bolts.

If the set is to be used on engines whose carburettor is fastened with hexagon socket screws, a fastening set is also required (5250049K).

NOTE: Only suitable for Vespa engines with a long sealing surface for the carburettor sump. Vespa T5 and some PX80-150 engines have less than 60 millimeters of sealing surface (measured between the holes for the carburetor mounting screws), the set does not fit here. The set cannot be used together with an oil pump.