Cylinder Vespino F9 / ALX / Velofax Polini

Cylinder in iron from POLINI with a diameter of 43mm, with bi-segment piston and 10mm pin.

This cylinder has 7 transfers and oval exhaust outlet.

It produces a power of around 4.8hp at 6300RPM, but with a good exhaust, carburettor, and transmission, it can reach 9 or 10hp.