Polini Big EVO 52mm 94cc stroker kit for Minarelli AM6 engines found in bikes like the Aprilia RS50 and Rieju RR.
Massive split exhaust in this aluminum, nikasil plated cylinder. Single piece head. Single ring piston with oiling holes drilled for longevity. Not for your daily rider.
Crankcase will require machining to fit this cylinder. Requires use of the 44mm stroke crankshaft from Polini, 210.0069.
Comes with cylinder, head, piston, ring, pin/clips, exhaust adapter, new studs, gasket set, and assorted hardware.
Polini 133.1012