Did this ever get figured out, I cannot find the info anywhere, on an 07 M1000 where is the tach/power supposed to hook up? I went to the yellow lighting wire and everything works fine but the tach doesn't work correctly at high rpm. It is accurate at idle, but peaks at 5400. I went through and adjusted calibration 4-5 times, it is correct as at every other setting, idle is not right. SIgnal must get confused at high rpm?