This is (I believe) the high speed air bleed. It has 3 little holes about halfway up. Interestingly, it has a hole at the bottom but it has been plugged by a a small amount of solder. Does anyone know what the benefit is to that either remaining plugged or not plugged? I know it's an odd question but it seems like it was originally designed with a hole and then was plugged later.
Thanks

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I re-worded my question in case I didn't make sense the first go round. Thanks

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I don't have an accurate answer for your question, but I do have this stab in the dark: the factory but the solder on there for a reason. I suspect that the solder on the bottom of the tube is to seal the tube and direct all vacuum/airflow/fuel flow through the holes the side of the tube. The tube is likely a tube because that is how it was most cost effectively manufactured but the solder had to be put on the bottom to seal it.

Thats the main well tube, connects to main air bleed. Leave it alone. Google this .............. main system emulsion holes david vizard