Polini 47mm 75cc R series cylinder kit for Vespa PK 50 and Ape 50.
Cast iron cylinder kit with large exhaust port and 2 auxiliary ports and 6 transfer ports.
Comes with cylinder, piston, rings, pin/clips, cylinder head, gasket kit, and a big bag of hardware for installation.
From Polini :
Polini refreshes the famous kit for Vespa 50cc with Ø 47.
The main feature is the new chilled head. It has a modern design that makes it
stronger with a perfect squish and it lets place the spark plug with long thread in the
center compared to the combustion chamber. The finning has been improved for a
better heat dispersion and the head gasket is made of steel with silicon content that
assures a perfect compression seal between head and cylinder (not available on the
original Vespa).
140.0053/R