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Old 30th December 2008
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Join Date: Jul 2008
Location: Heartland
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Sportster/Buell Model: XB12Ss
Sportster/Buell Year: 2008
Other Motorcycle Model: XB7.5 Land Speed Racer
Other Motorcycle Year: 2009
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Default XB rear head temp sensor...

Does anyone here know the full function of the rear head temp sensor on the XB motor? Does it affect the cold start circuit or is it used for over-temp condition, or both. I'm building an LSR bike with an XB9 motor and I have dual plugged the heads. The second plug on the rear cylinder goes where the temp sensor is located. I would like to know if I can run without it or if I need to find another spot to locate it.
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  #2  
Old 30th December 2008
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Default

Well, it looks like I have answered my own question with a little more research. The Head temp sensor works with the ECU in the full operating range. The temp sensor is just a 3/8-16 plug, so it will be easy to find another spot in the head to drill and tap a new mounting location.
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