Based on my experience, I'd bet it's (Chinese standard) normal. Maybe one of us has tried one of the 'race' CDI's which supposedly remove the rev limiter, if there is such a thing.
I think, for me at least, 55 MPH and 7,500 RPM are reasonable operating limitations for a little 200 cc OHV engine. As long as it continues to run well I'll quit while I'm ahead.
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