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That looks to be the stock carburetor a PZ25. I would lock the throttle all the way open. Get a spray bottle or dropper some means to get some gas back in the manifold and some gas into it and crank it over. It should run smoothly for a few seconds given you have good spark. If it fired erratically I would think something is off with the timing of the engine mechanically or the cdi signal pickup or cdi. If it ran smoothly for a few seconds I would look at another carburetor to try.
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