My bike has many mods, done by former owner. Among them the O2 sensor bungs are plugged. How would this affect performance? Anybody else have theirs blocked off?
Depends on the mods.
If still using unmodified factory computer, it just richens the mixture by telling the computer the engine is cold - like leaving the choke on with a carb.
That's often the first attempt when intake & exhaust mods are done & it's running lean.
Left like that, it will help cover lean spots, but mileage & performance are not great.
BUT... Most fuel controllers don't use the sensor feedback.
If it has a fuel controller like dobeck, LLoydz, power commander, etc, then they are just removed from the loop & the engine is tuned with the controller.
Is there a controller under a sidecover or under seat?
List out the other mods & it'll be easier to help complete the picture.
Sent from my XT1585 using Tapatalk