I have a 2012 Switchback .I have a D&D exhaust and a SE high flow breather.I have started to get codes for O2 sensors front and back.Had them changed out and reset codes and went 80 miles and the codes are back on.Bike runs good has a little popping on deceleration but not bad.I do not have a tuner.Anyone can help me out I would really appreciate it.Thanks

 

I just talked to the tech at harley Davidson and I was wrong I thought he changed the sensors but he changed out the engine temperature sensor. He said he hooked up the 02 sensors and they checked out ok but the engine temp sensor did no so he replaced it.Thanks

 

Which O2 sensor codes do you get?

If you get a code indicating rich or lean, the O2 sensors are very likely working correctly but you have an air or fuel issue.
Intake or exhaust leaks, low fuel pressure and injectors plugged can cause lean codes.

 

The best thing you can do at this time is to get a tuner. The bike will run so much better (unless you're happy with just "runs good") and then you can worry about the small stuff

 

Can the dealer tell you if a Stage 1 tune was applied to the bike by the previous owner?

If you decide to get a tuner, check out the DynoJet PowerVision.
The FP3 is Vance and Hines and they have tunes only for Vance and Hines exhausts.

Fuel Moto has then and offers great tune support. Current price $399.99 not much more than a FP3
https://www.fuelmotousa.com/p-28398-...er-vision.html

They usually have sales around black Friday / Christmas.