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Old 09-11-2010, 02:35 PM   #1
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carb air cut-off valve (TRX 350)

Out of curiosity, what is the function of the air cut-off valve? Am trying to remove the needle holder from the vacuum piston with no luck, Any hints? With a phillips I can turn the holder but can't get it to budge.


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Last edited by JimC; 09-11-2010 at 03:36 PM. Reason: Used wrong term
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Old 09-12-2010, 05:14 AM   #2
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Old 09-12-2010, 05:26 AM   #3
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The air cut off valve cuts air off when decelerating quickly, making the fuel mixture richer, to eliminate back firing.
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Old 09-12-2010, 02:18 PM   #4
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I had the carburator apart to replace the choke cable and I believe I left an o-ring off of the air cut off which probably explains the backfiring. Thanks for your info.
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