I thought I had posted about the 2009 R1 MOSFET R/R swap in this thread but apparently, I posted about it elsewhere.
I got it installed and it holds the voltage between 14.1v and 14.3v, much better than the OEM's under 13v to a little over 15v.
From the OEM R/R. the black wire is a sensing wire, it isn't used with the MOSFET R/R. Red is +, Green is - and the other two are the stator. I plugged the middle gray connector and hooked up the two stator wires to the remaining gray connector terminals but you can do it in any order you like.
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