I would add more coolant and try it again, to see if it is losing coolant and if the light comes on again.
It is likely an overheat light instead of a low coolant light.
Is the radiator fan running when this light is on? You can check the fan by revving the engine with the bike stopped and the transmission in neutral for a few minutes- no air flow through the radiator should make the fan turn on to help cool down the engine.
Riding the bike with this light on for more than a couple of minutes could damage the engine, if the light comes on like it should when the engine is too hot- there is a possibility that the light itself is not working properly.
Last edited by ZZR600-2008; 05-21-2017 at 11:25 AM.