Basicaly took engine apart and the pistoms need some new rings and im wondering what ones to get in terms of size as the size on the piston is 80.443mm amd when i looked up the standard size it was 80mm? So does this mean ive had a 0.5mm overbore ? And that i should go for 0.5mm overbore rings?

And if anyone know what make the pistons are that would be good too

CheeRS!!