polini piston ?

can someone please tell me if PR 130cc (part num.12185000) piston is compatibile with original pk 125 xl cylinder - I just need new piston not the whole cylinder set ?

I apologize if this question was already asked but I don’t understand german.

Regards Peter

Please can you advise me. Do I need to buy original piston (kolben) or can I put in PR or Polini piston?

No, he is not compatibile [:(] , you need the orginal piston for
your PK.