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Old Oct 22, 2013 | 08:23 PM
  #31  
12hdrk's Avatar
12hdrk
Road Warrior
Joined: Dec 2012
Posts: 1,335
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From: CT
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Originally Posted by ke5rbd
....You may want to check the vacuum plug on top of the intake and make sure it is inplace. If it is missing it will cause the lean condition which is what you are describing. It is a black 1/4 inch plug on top side next to the air cleaner. It will also let bike ping if it is missing. You would think it would make bike idle poorly but I have seen them off and bike idled fine. The plug can get blown off if the engine ever spit back through the intake. If it is off you will chase your tail forever trying to tune for it.
Yup. What he said exactly. Just went through it. Put a new cap on and put a zip tie so it couldn't pop off again.
 
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