anyone know of any resource for "decoding" the numbers stamped on amal carbs that tell you what model bike they were originally on? I'm curious because the ones on my 73 750 are 932's (should be 930's from what little i know) and each one has a different stamp, one is 26 the other 27. anyone know what these numbers equate to? im thinking somewhere down the line my dad replaced them at some point wherever he got these (no internet back then...)