Polini reed valve intake manifold for Vespa PK XL - optimized intake for SHB 19/19
The Polini reed valve intake manifold for Vespa PK XL is the perfect solution for setups with Dell'Orto SHB 19/19 carburettor and 3-hole mount.
The diaphragm control replaces the factory rotary valve and allows a much freer intake design. As a result, the timing is no longer dependent on the condition or shape of the rotary valve.
The result is a noticeable improvement in the lower and medium speed range: more torque, better response and a smoother power delivery. As with rotary valve stubs, the same applies here: The correct connection piece must be selected to match the engine housing and the mounting method to ensure clean installation and optimum function.
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