Hi Humanbeing,
you are correct it is not typical.
My engine is marked ZS167FMM... which would indicate a (1)single cylinder ans (67) mm bore.
But as we know this is China manufacturing.
It really would be a CG230*
This is why it is important to measure the piston before ordering a replacement.
The cylinder, piston and wrist pin from my engine match the dimensions in your provided image.
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