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Old 03-23-2016, 07:39 AM
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x-bird x-bird is offline
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Join Date: Oct 2011
Location: Penciltucky
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yep, upside down if the plunger is not sitting on the float tab. when you adjust the float, have have to make sure that you're not fully depressing the plunger, can be a little tricky. there are no seals per-se on the needle or seat, there are various coatings on the needle tip in some cases. If you've gone with a carb from a pulse pump fed fuel setup to gravity feed, the needle can be overpowered by the sitting fuel pressure. In that case you need a different rated one. Or be religious about turning off the fuel as soon as you shut down. I had that issue with the vm-26/512 oem suzuki carb on my 250. It was an oem carb made by mikuni and there was no existing needle seat combo available to overcome gravity feed so i had to convert to a fuel pump and fuel pressure regulator.
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