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Old 03-31-2013, 01:11 PM   #12
roger 04 rt
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Joined: Nov 2011
Location: Massachusetts
Oddometer: 2,294
Originally Posted by pecos View Post
I don't think I have any of those. Stock muffler.
You should have a pink coding plug 30-87-87a in the spot that says remove this plug, on this diagram I grabbed. It's okay not to have a plug but it can be very different running.

If you have no plug there, your 1100GS doesn't use your O2 sensor, and it idles much richer, although usually not so rich it won't run.

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