Float height cv34

Hello whats the set of the keihin float cv34mm are supposed to be?! I want the measure from the carb and the top of the float .. not the gas tube method of it’s possible. 
thank you so much 
maxime

The gas measurement method is the only proper way.  And unless your float needles are in very good shape, I recommend changing them for new.  Either OEM (expensive) or Keyster (the best of the aftermarket needle makers.)

Can you explain me how to do that?!  Fill up the carburetor and open the drain valve.. I understand that, but do I need to write a measure on the tube for be sure the gas don’t exceed the mark?! Or the gravity do his job and I only need to check the 4mm behind the bowl ?! Thank you again

The procedure is well described in the factory service manual.