Bike won't start when warm, and temperature readout is erratic
2006 ZX6R 636
Bike runs great until you shut it off. If the temperature is over 140-150 it will not restart. The temperature gauge bounces around though. Such as 175 to 189 to 176 in a matter of seconds. We have changed the coolant temperature sensor. Fan never comes on, but works with external power. Have checked fuses and relays. Have a 2nd 636 that we have swapped ECU with and same results. Have jumped all 3 connectors from the temp sensor to ground, ecu, and display, and seen no change. Also no trouble codes besides the exhaust valve that is removed. Quite stumped on what to try or check next.