At a trial yesterday, my 2010 Evo 300 4T was overheating and when I checked the fan, it was running very slowly with the bike at idle and when I revved it, the fan stopped completely. When the bike cooled down, the fan didn't start to run, which implies to me that the thermostat is OK. The fan can also be turned freely and there is no noise coming from it.
Before the trial, I had removed the small covers on the frame to polish it, but I checked again and the wires don't seem to be trapped or damaged.
Any suggestions on how to diagnose it or do I just need to buy a new fan assembly?
Thanks