Banana
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| posted on 13/4/17 at 09:17 PM |
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Carb question - what is this for
I noticed the diaphragm seems to be pinched on one of my carbs around the area highlighted in the picture.
What does that hole/jet do?
 
Description
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r1_pete
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| posted on 13/4/17 at 10:15 PM |
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Long time since I worked with cvks but Im sure its the vacuum port which raises the diaphragm / throttle slide.
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dd1972
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| posted on 14/4/17 at 07:03 AM |
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quote:
Originally posted by r1_pete
Long time since I worked with cvks but Im sure its the vacuum port which raises the diaphragm / throttle slide.
Spot on as this man says.
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britishtrident
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| posted on 14/4/17 at 08:23 AM |
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Yes a depression port it has the same purpose as the holes in an SU or Zenith-Stromberg CD piston.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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Banana
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| posted on 14/4/17 at 08:38 AM |
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Thanks guys, the Haynes book doesn't actually make any reference to it.
Im hoping that is the cause of the hesitancy at full throttle im getting..
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r1_pete
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| posted on 14/4/17 at 11:03 AM |
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If there is any leak around the diaphragm seal you will get poor running, I used to put a layer of ruberlube in the recesses where the bead seats,
keeps the rubber supple, and has a slight swelling property, so ensures a good seal, and makes future removal easier.
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