Motorcycle Questions? Ask a Mechanic.
Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, proposed preliminary tries (if have not been done):
Of interest would be for any pinched, fused and/or exposed wiring particularly from the temperature sensor.
Test when the wire to the temp sensor is temporarily disconnected and then when made to touch the chassis/engine ground. Observe reaction/change on temp light. This would serve as a test by process of elimination.