the revised # service carb can still be found to replace that particular one with the correctly drilled Idle circuit, mainjet, and passages. its Tecumseh part number 631795a. Tecumseh Service carbs do not come with the choke lever, has 2 holes to position the detent spring (depending on lever used for your application) so you transfer yours onto it and the throttle shaft is made so you can bolt on the correct bellcrank to the top for your application. If it does not come with the bellcrank, simply file off your OG from the shaft and screw it on.
If your looking at a carb that has a pull style throttle lever on it, its for a larger engine application and the circuits and bore will be different, and in the Chinese carb world they are usually too large internally already compared to the OEM's and don't function well.
@ELT Do you need one of the mini bike specific HS 631625 choke levers? I have them in stock, but they are pricey $25 + the ride