Re: Do I need an O2 sensor plug when I change my exhaust?
I would assume you'd need the sensor if the bike ever requires inspection.
The ECU is taking data from the O2 sensor and adjusting the fuel map to suit.
Removing or disconnecting the sensor will give an error code.
What the ECU will do when it lacks data from the sensor I don't know.
Try disconnecting your sensor now and see if the bike runs any differently.
If it does, I'd suggest putting the sensor into the new system.
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