The cylinder is aluminium with a cast iron liner. The piston is a 52mm diameter with RIK rings, 14mm piston pin. Includes a gasket set....
Polini top end assemblies for 50cc can be used to recondition the cylinder kit with an identical reliability specification to the manufacturer's origi...
Ø39mm Cast iron cylinder Supplied with gaskets Supplied with complete piston (axle, clips, ring) ...