Thanks Dan, I guess some of these oem switch kick on at different times, weird...I know my TSF591 I got from advance auto works great 5/8 every time..As long as these cycle on and off while sitting in traffic you should be good...It's a matter of how hot would you like your bike to get...Now you have a choice 3/4 stock 5/8 TSF591 or the new one from auto zone which comes on at 1/2 MT1373, on a normal 95 degree day the fan never comes on if I'm rolling it's always well below halfway, its when sitting in traffic does it come on..Now guys have a choice..I have not yet found a switch that kicks on at 3/4, if anyone finds one let me know, I tried the one the guys were discussing years ago the TSF596 but it came on way before 1/2 :shock: they said it was 3/4 but I don't know..