The PZ30 is a Keihin clone, and the Mikuni is very similar. The Keihin usually has three float bowl screws (vs. four on the Mikuni), the slow jet numbering system is different and the Keihin has one vertical guide for the slider (vs. two on the Mikuni).
The accelerator pump is a rarity among China bikes in North America, AFAIK. I had a 1981 Honda XL250S with a Keihin accelerator pump carb, and it was terrific! It usually started on the first kick.
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Weldangrind
"I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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