Polini 208 piston single ring change on polini two ring piston

I have a PE 200 VESPA 1986.My engine has fitted a polini 208 cylinder piston on the second oversize.I have a problem with one ring piston and i would like to know if i can put the polini piston 208,8 with the two rings piston.



you can fit the 2 ring piston, but you have to use also the cylinderhead of the 2 ring Cylinder or the MMW Cylinderhead ...