Parmakit 43.5mm cylinder for Vespa Vespino and Velofax mopeds. Aluminum with nikasil plating. Pretty basic port map but should give a solid boost to your Vespa. Comes with a 2 ring piston that features a notched skirt.
Comes with cylinder, piston, rings, and pin/clips. Does NOT come with a gasket set! You'll have to trim something up.