[yorkie]

hi, it's not the butterfly but corrosion on the carb body that the butterfly shaft runs through had this once on a old set of carbs. plenty of penetrant perhaps a little heat and keep working it open and closed. perhaps a strip down and a session in the ulta sonic tub might help, but I would not attempt removing the screws on butterfly.

 

[yorkie]

anything man put together. can be taken apart by man, it's all a matter of force

FOG

yeah sure, as well as dexterity, knowledge, skill, and the right tools. sadly most or all are lacking in the average amateur.