Hey guys new here, and a new rider been riding few months now and i have a 2006 cbr f4i such a great bike. It has an fi light on for a code 23 for the o2 sensor. It has a coffman shorty on it and the o2 sensor is in it but the connector doesnt go anywhere i cant find the bike side harness anywhere pulled side fairing and fuel tank and found nothing.Bike doesnt have a power commander either. Just curious i need to get it through inspection and it failed for the fi light

 

Welcome to the forum, lets see some pics of your bike.
AFIK the O2 sensor plug is at the back of the tank above the shock buried in there in front of the battery and was white if I recollect correctly.

 

Here she is! I appreciate your input

 

Somehow i have a cali ecu explains why i dont have the plug, bike was laid down by someone and i suspect ecu took a hit.