Yesterday I rode down the M2 in Sydney, about 20km at 100km/h.
I took the Pacific Hwy exit and immediately was caught in slow moving traffic. I didn’t turn my cooling fans on – it was a cold day (about 15°C) with light rain. I figured the engine wouldn’t need forced air cooling on a day like this.
After 10-15 minutes of slow moving traffic and trying to find a parking spot, the engine went into ‘parade mode’. The engine heat sensor sent a signal to the engine control unit that the cylinder head was too hot; take action to keep it cooler.
I was mighty surprised given the weather conditions and short time in traffic. It reminded me that I should use my engine cooling fans whenever I’m moving under 60km/h.