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Hi name is Steve I have 2011 roadglide Ultra I just put a heavy breather and new pipes on now I have some black smoke coming out when I let off gas I also have air pressure when I loosen my oil cap it last for about 20 seconds I know this is not right what causes this
 

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Make sure the AC is installed correctly, that the head breathers are unobstructed.
 

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Hi name is Steve I have 2011 roadglide Ultra I just put a heavy breather and new pipes on now I have some black smoke coming out when I let off gas I also have air pressure when I loosen my oil cap it last for about 20 seconds I know this is not right what causes this
You did not install the head vent bolts correctly I'm betting .

Re-read the install directions once again paying special attention to the drawing on how the new bolts go . :)
 
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