This is a accurate 3D model of a 50cc pocket bike piston, designed with precise dimensions to match real-world specifications. If you have access to metal 3D printing, this piston should be fully functional in an actual engine.

I’d be thrilled if someone managed to get an engine running with a plastic-printed version! But even if not, it also makes for a great decorative piece or display model. If you give it a try, feel free to share your results!