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Which o2 sensor goes where

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Old Aug 29, 2013 | 05:37 PM
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madmustang4
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Default Which o2 sensor goes where

Sorry, know this has been asked before.
Have a 2012 Ultra classic and I’m changing out the header and like a dumb butt I didn’t pay attention when I disconnected the O2 sensors from the bungs. Now it’s time to hook things up and want to make sure I’m right.

The sensor with the black connector (PN 27809-10) connects to the front bung (i.e. front cylinder)?
The sensor with the gray connector (PN 27729-10) connects to rear bung (i.e. rear cylinder)?

I think that’s right?
thanks
 
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Old Aug 29, 2013 | 06:39 PM
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Black is back... rear cylinder.
 
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Old Aug 29, 2013 | 07:05 PM
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Better make sure you have the correct sensor in the correct part of the pipe as well so as stated black sensor goes on the rear headpipe and grey sensor on the front headpipe.

Plenty of people have put them back in the correct connector but had them in the wrong pipe.
 
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Old Aug 29, 2013 | 07:54 PM
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scotty
agreed and thats what im trying to avoid.
 
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