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47mm head for Derbi Variant mopeds
New replacement variator and clutch setup for your Motobecane 50v or similar
Comes with a full top end gasket set
this head can lower temps due to a better combustion geometry and make more power from a squish band that is designed to work with the stepped face of the Polini piston
It has two female connectors
Vespa PK 50 Polini 47mm "75cc" Racing Cylinder Kit 4.5 47mm head for Derbi VariantPolini 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 47. The main feature is the new chilled head. It has a modern design that makes it stronger with a perfect squish
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