Cylinder -VMC Stelvio 2.0 177 cc Ø63, stroke=57mm, aluminum, slanted spark plug, Vespa PX125, PX150, Cosa125/150, GTR125, TS125, Sprint Veloce (VLB1T 0150001-), LML Star/Stella 125/150, Motovespa PX125 Iris(99M), PX150 Iris(75M), 125 CL (9CL), 150 CL (9NC