To quote Dominic, who has certainly had his hands on more carbs than I have: "... chinese crap and would steer away from those as I've tossed a few in the trash for having issues..."

Even the fancier billet version isn't a good product. More examples of cheap offshore copies that aren't even GOOD copies.

I think Mark Whitener commented that by the time you've checked and corrected all the passage sizes with these things, you would have wished you'd bought better parts to start with.