Oversized Pistons?

Hi, my name is João and i have a 150 vbb1t and i want to change the piston because the vespa has the original one and lost compression. My question is about the piston size, i have seen measures that goes from 57mm to 58,2mm. So, does a 58,2mm (oversize 5 OS) fits in an original 150 cylinder? Or does the cylinder needs to have some modifications? 

Beste regards...