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Author Message   Jadow Posted on Sunday, May 15, 2011 - 09:13 pm:        I have a 2008 XB9SX. Can someone supply the Temperatures that turn on the fan Low and high speed and turn off the fan. I am guessing the ECM recieves the temp from the rear head sensor. Thanks   Froggy Posted on Thursday, May 19, 2011 - 11:46 am:        The on/off temperatures vary depending on your firmware version. Buell changed it a few times on the DFFI3 bikes.   Jadow Posted on Thursday, May 19, 2011 - 01:31 pm:        How about 2005-2007 XBs models? Would it be different between 9s and 12s since the 12s always seem to be hotter?   Mesozoic Posted on Tuesday, July 19, 2011 - 04:25 pm:        2008 XB12, BUE2D calibration. Fan Key-On ON temperature: 220*C Fan Key-On OFF temperature: 180*C Fan Key-Off ON temperature: 190*C Fan Key-Off OFF temperature: 170*C Fan Key-Off Run Duty Cycle: 40% Hope that helps.   Terrys1980 Posted on Tuesday, July 19, 2011 - 05:05 pm:        On the 2004-2007s with BUEGB231 firmware the temps are. It doesn't matter if its the 9 or 12. Key-On ON temp - 170C or 338F Key-On OFF temp - 130C or 266F Key-Off ON temp - 120C or 248F Key-Off OFF temp - 100C or 212F   Mesozoic Posted on Tuesday, July 19, 2011 - 05:35 pm:        I just read my tables and scalars through TunerPro, but I'm not sure if I believe it. I've datalogged my bike warming up and it turns the fan on around 100*C, well below the datapoints found in the tune.   Jadow Posted on Tuesday, July 19, 2011 - 07:01 pm:        Thanks! That helps alot.   Majorroadie Posted on Thursday, August 16, 2012 - 07:31 pm:        How can I update the firmware to the newer fan on/off temperatures? My CEL has been coming on the past few rides when sitting in traffic and the fan is not always coming on. Is it possible that updating the firmware and getting the ride side air scoop might help?   Jadow Posted on Thursday, August 16, 2012 - 07:44 pm:        Yes, any dealer can upgrade your firmware to the latest. Just be sure you want this. The fan comes on when you roll on the throttle and runs until you come to a stop. a few friends with stock mufflers got anoid by the fan running and louder in the neighborhood than the muffler. I think it was the idea of getting the motor cooled down before the rear head reached critical temps.   Froggy Posted on Thursday, August 16, 2012 - 08:07 pm:        If your CEL is coming on, something is wrong, but if I had to take a stab your fan is failing and needs replacement, or has a bad connection. Changing firmware settings and adding scoops won't fix the issue, at best it would be a bandage.   Mesozoic Posted on Friday, August 17, 2012 - 11:48 am:        BTW, I think that righthand side air scoop made a significant difference in engine temps running around here in the desert.

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