four days back i bought one and i am slowly getting to know it better. I have few questions about my bike, those who own the same model please help me out fellas because i am dying to get some questions answered.

From the moment i bought it i have already ridden it for more than 45 minutes constantly and i haven't seen the radiator fan spinning. Shouldn't it spin when the engine is hot? it doesn't spin at all and it never spin so far ever. I asked my mechanic and he doesn't know about my bike but he says it only spins when the bike is stopped in one place for more than ten minutes after running.
Outdoor temperature is well over 30, i am 100% sure about that, i live in a tropical country.