This piston set is for the pk80;
PK80 High Hole Piston Kit including 1 piston 47mm, 2 piston rings (piston ring is 2mm),1 piston pin and 2 clips
For your new cylinder build or as replacements.;
Out Diameter of pk80 piston: 47mm;
The real pk80 piston 10mm diameter of the hole; the ring is 2mm; the diameter of the pin is 10mm;