Afternoon fellas! I recently bought my kids a 2011 Sportsman 550 X2. The bike is pretty much stock and all it needed was a rear diff, which I replaced with a 850 diff and deleted the turf mode. My kids have been riding the piss out of the thing, but I have noticed that the temp light kicks on once the bike is rode for about 30 mins. It will light up and then go off when the fan kicks on. I have checked to make sure thermostat is working and it is, radiator looks brand new, I have bled the system, got it hot and popped the cap open and added antifreeze etc. the bike is not overheating, the engine light never comes on and it never goes into limp mode. Fan works and all that, it just keeps tripping that light. Could it be the temp sending unit or the thermostat not opening until it gets to hot? Or could it be an issue with ecm which I have read about? Again, it is not over heating, but that light is driving me bonkers. This bike is new to me and I couldn’t find anything like my issue on the forum, except bikes that were actually over heating. Any help is appreciated.

Thanks