It appears the float rides on two lower fingers on the needle/seat lever alowing a small amount of pivit of the float,,I would think that if the "float bowl were removed" and with the "carb up-side down" ,and the "float layed "gently" on the two fingers" of the needle/seat that you could get a reasonable acceptance angle from the angle of the float to the angle of the gasket surface of the carb,"kids protractor" will be good enough,,now the carb. can be mounted at "any angle closer to level" on the bike than that measurement of the float",Also the closer "to level" mounting of the carb allows operating the bike up/down steeper hills with out the float closing the needle/valve "too soon" (starving for fuel),or "too late" (flooding the carb)"both ways not any good for powering out of a situation" IT should take care of any float sticking problem also(check the jet for tight,(,goes through center of the float),, while in there.
Thanks,Gene
sorry I dont know how to under line words