Recently, I replaced the two o-rings on the float assembly. So, obviously, needed to check the float level. Manual says 14.7 + or - 1mm. Simple enough, turn the carb upside down and set the float level. Well, not really. Float level is supposed to be set with the float tab 'just' touching the needle valve. Inverting the carb 180* might compress the needle valve spring-----this isn't what they mean. Rotate the carb until the float tab contacts the pin in the needle valve, not 180* (upside down).
Someone brought this up recently, and is when I re-read the manual. YMMV, etc.