O2 sensor? What if we just unplug it for the lean issues?

Hello,Guys.

I am Alexey from Ukraine and need your's help. I have 2011 Stryker with V&H 2in2 and Cobra intake. Yesterday I threw into the trash my fuelpak, because i was dissatisfied of his work. Last season I constantly tried different values, but these secrets with his maps made me completely angry.

I started to drive without tuner. With the O2 sensor connected, the mixture is slightly lean, and the famous dips at low speeds.

Then I saw your topic and turned off the O2 sensor. It's a completely different bike.
Dips at low speeds disappeared and the AFR became richer (apparently the ECU switched on the emergency map when the sensor was undetectable). Spark plugs in the normal state, the insulator is light, but the electrode is dark.

I want to know how many of you drive without a tuner with the O2 sensor turned off with intake?
Did you check your AFR on the stand?

I like the flash service from Ivan, but for me it is not available, because i am in Ukraine.
I found a local master in my country, but I do not have the confidence that it will make the right tuning in the ECU. He promises me to adjust all fuel maps from ECU memory so that there is no need for a tuner(PCV or others).

Maybe me should continue to drive without a sensor and not worry?

Thank you in advance! Sorry for bad English.

Thank you for reply. Yes, bike running very well. But the best is a enemy of good)
I want to send ECU to Ivan, but he does not answer my private messages. And for call I have bad English. Does anyone know his email? Thank you!

Although my spurk plugs at perfect condition. I use 95 EURO octane, this is 91 according to the American standard. The motorcycle really goes well, and feels and sounds a very balanced mixture ... but I would like to get the maximum benefits, too well you describe Ivan's flash.