Incorrect, my guess is it's a ZS163FML, a ~200cc Zongshen-built engine. I know because I have one similarly marked.
The 125s are almost always 56mm bore x 49.5 stroke (stock Honda dimensions). The 200s are mostly 63.5 bore x 62.2 stroke (again, following stock Honda conventions for their 200cc ag bike).
If you look through the earliest threads I've posted (I haven't posted too many), I came across a similar conundrum, you can look at my engine to compare.
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