How do you install piston and ring Honda 94 cr 125?

you have to first take the jug and the head off and once that is off take a really small screw drive and pop one of the wrist pin locks off adn slide the wrist pin out of the piston then put a new piston on insert the wrist pin and the lock adn reinstall jug and head... done ... about a 20 min job if your quick