for Vespa 90-125/ PV/ ET3/ PK/ S/ XL/ 2 58,0mm 1 piston ring(s) trapezodial pin =15mm Grade A – perfect repair Product description VERTEX , from Italy, produce originalpistons for many currently produced two and four stroke motors. Their pistons are found in original KTM motors and their aftermarket range are known as ‘Performance Pistons’. Their pistons are also becoming extremely popular for the high-end tuning of Vespas and are included as standard with the performance cylinder made by FALC.The’PRO RACE’ forged piston by VERTEX is a very high quality and also low in weight. The high-end alloy used in its construction ensures durability and more resistance to heat seizure.The piston skirt is provided with a low friction surfacing layer that assists during the running-in process, to match the piston to the bore of the cylinder. It is also provided with weight saving cut-outs above the gudgeon pin opening and its pair of 1mm thick piston rings increase stiffness, stability and compatibility with higher motor speeds.Aluminium/ 57.00/58.00mm diameter/ plated bore contact surface/ 2x1mm piston rings Prior to initial assembly check the piston/piston ring clearances!