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The previous correspondence is half way down page 5, the last posting was Friday March 10th. 2006.
As I write I have my brand new top feed 206/151R carburettor beside me for reference. You may rest assured that the dimensions given in the previous post are accurate.
I note however there is one more piece of information that could assist. This is the dimension from the top of the float to the mating face of the screwed on float chamber top cover/ float chamber body joint. This dimension is 0.75″ (19mm) with the float needle sitting in the closed position in the needle valve.
In addition I have checked the fuel height as there seems to be some disagreement on the subject, the correct height should be 0.75″ (19mm) below the bottom of the carburettor’s 1.0625″ diameter choke. Put another way the correct fuel level is 0.25″ (6.35mm) below the two 0.093″ diameter holes positioned port & starboard in the carburettor body just above the screwed on bottom fitting/banjo assembly.
Gawd! I wish I could put pictures/drawings on ‘ere! It’d be so much easier than trying to guess how many ways there will be of miss-reading my written word!