It would be interesting to see if there's 2mm difference in natural float level between oem floats.
That 2mm variance in the OEM float level would require a 1.5 gram variance in the float weight, at the float cells. That's a lotta brass/solder for those thin-walled cells. It would be much more if the weight variance were at the crossbar.
... real Mikuni parts are made to close tolerances, cheap repops are not, and defects are going to make a difference.
That's why the OEM float level variance is highly unlikely.
...You can't get something for nothing, but if you buy cheap enough you can easily get nothing for something.
Well, it was worth a try.
Now we know...