cylinder base spacer Polini Big Evolution 5mm for Minarelli horizontal LC 170.1001 fitting for Aprilia Gulliver 50 LH040 1998, 4,3 PS, 3,2 kw

This 5mm spacer is needed if a 85mm long stroke crankshaft to be built 210.0022 in combination with a racing cylinder with 80mm stroke. Will come supplied with four matching studs.