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Thread: Any last ideas before I dive into the world of custom tunes?

  1. #41
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    If I remember correctly, I think ECMDroid has entries for max and min AFR that you can just set to 100. That way the system can't adjust based on the closed loop even though it is still reading the o2.

  2. #42
    Senior Member lowkey's Avatar
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    RaceVSStock07EEPROM.jpg

    Here is race vs stock EEPROM's enrichment tables(BUEGB vs BUEIB), I have no way to verify if the data was changed or not as I got them from the internet and not an ECM. The ECMID checks out though... I opened a stock XB9 EEPROM and all values for enrichment are the same except WOT is 105% instead of 110% on the XB12 EEPROM's.

  3. #43
    Senior Member lowkey's Avatar
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    Quote Originally Posted by yugo42 View Post
    If I remember correctly, I think ECMDroid has entries for max and min AFR that you can just set to 100. That way the system can't adjust based on the closed loop even though it is still reading the o2.
    You are correct but you want the O2 signal deactivated from the ECM (making adjustments off the signal) for logging. The voltage for NB is 0-1 and WB is 0-5 also the voltage is reversed for AFR rich/lean. It's two separate things that need to be done, lock AFV at 100% to not skew the fuel tables and disable the O2 sensor so the bike runs in open loop off (the entire map is now open loop) of the fuel map cell data only.

  4. #44
    Quote Originally Posted by lowkey View Post
    Hook up the sensor and pull it out of the header, what AFR and voltage reading do you get? If it reads max lean AFR and 0 volts you will need to track down the data if it reads max AFR but has a voltage percentage I think you could take that as the flat line point in the linear line, do the same in a propane rich cup with the sensor in it to find the voltage point on the other end of the AFR rich spectrum. I would contact for the chart to double check the data works exactly right though to be sure.

    My setup is the gauge mounted to the handlebar as I posted then feed the bulk of the harness into the airbox and zip tie it to the filter cover then feed the wiring harness along the engine harness under the seat. The O2 sensor comes back out the airbox and gets zip tied to the clutch cable bracket on the right side near the front engine mount and into either the front or rear header pipe. The WB signal wire has good length and feeds from under the seat over the shock area into a cutout in the frame then plugs into the stock ECM harness plug for rear O2 sensor.

    I can compare the enrichment tables of stock VS race EEPROM and take a screen shot.
    lowkey once I'm done traveling I'll get the set up out and check the max lean and voltage it puts out. It will probably be some time this weekend.
    I dont have and AFR guage but other then that sounds about the same to yours.

    Quote Originally Posted by lowkey View Post
    RaceVSStock07EEPROM.jpg

    Here is race vs stock EEPROM's enrichment tables(BUEGB vs BUEIB), I have no way to verify if the data was changed or not as I got them from the internet and not an ECM. The ECMID checks out though... I opened a stock XB9 EEPROM and all values for enrichment are the same except WOT is 105% instead of 110% on the XB12 EEPROM's.

    Those tables look the same in my bike as well. Seems like if your bike is running good, with out jerking, and stumbling, maybe acceleration enrichment is not the culprit.


    How ever I do think mine is running "lean" during idle. Tuning guide recommends 14.7, and as low as 13.2 for crisp idle. I did fattened up the idle area a little and will have to see what it looks like after weather gets a bit better.
    Last edited by cossack84; 03-17-2019 at 04:08 PM.

  5. #45
    Senior Member Cooter's Avatar
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    FYI, Enriching the idle to as little as a 14:0 target makes for a stinky stop light.



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