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Cv carb question

  • Thread starter Thread starter Suzuki_Don
  • Start date Start date
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Suzuki_Don

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When you lift the slides on CV carbs to the top of their travel and release them, should each of them fall down at the same speed. If one is slower than the other three what is likely to be the problem?
 
Last edited:
Suzuki_Don said:
When you lift the slides on CV carbs to the top of their travel and release them, should each of them fall down at the same speed. If one is slower than the other three what is likely to be the problem?
Click to expand...


In my experience re-building my carbs the simple solution was to clean the slides with spray carb cleaner, and also clean the bore they rest in. Do not !!!! spray any WD40 or other lubricant it will only gum it up and keep it in the wide open position.

Hope this helps.
 
Yes they should. Check the springs in the top are matching.. you could swap two around to double check if that's the issue. I would think it's likely to be varnish on the slides that's the problem.

You could also try swapping slides from bore to bore to see if you can find one that it slides better in... I've done that before. Tolerances I assume. You can mark a number on the slide with a black marker pen if you want to keep track of where they originally came from - won't do it any harm, I've done that too.....

Dan :)
 
remember there are springs pushing the slides back, so as long as the slides slide freely the little difference in how they drop in by gravity only doesnt matter that much
 
psyguy said:
remember there are springs pushing the slides back, so as long as the slides slide freely the little difference in how they drop in by gravity only doesnt matter that much
Click to expand...

This is with the springs in place and tops on the carbs.
 
Thanks Dan I will try swapping the springs around and the slides also to see if I can work out the differences by process of elimination. thanks
 
Suzuki_Don said:
This is with the springs in place and tops on the carbs.
Click to expand...
in that case i'd suspect some slides may be a little stuck
carb cleaner on a piece of cloth and a bit of rubbing on the piston and bore should hopefully see you right, unless theres some deformation on the slide :-k
 
And if it doesn't drop at all you forgot to put the spring back in!

Done that one.
 
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