From what i noticed before, the fan would come on sometime around 210F. The temperature would continue rising until either it auto shuts off or when i start moving. I am going to check out the relay to make sure that isnt bad.
I am no professional mechanic, this is my only basic understanding of how watercooled vs air cooled motors work. Air cooled engines have fins on the cylinder part of the motor itself and often do not require fans because of convection currents and based on design and other factors. Even sitting in traffic with an air cooled motor runs fine. Water cooled on the other hand have a separate radiator from the motor while the cylinder is cooled by water running through the jacket. Water cooled engines require constant movement of air since the fins on the radiator are inefficient at convection. Thats why in traffic, watercooled bikes have fans. When the fan does not work, well it overheats.
Im no mechanic but this is what ive come up with about the fan kicking on after the engines off.After you shut off the engine (when the engine temp is slightly below the teperature the fan kicks on at) the coolant is no longer circulating, since the coolant isn't flowing through the radiator to cool down it will heat up a few more degrees and trigger the fan to kick on.
Flipping the red kill switch on the bars instead of turning it off with the key.I usually shut my bike off the same way as you, but if its pitch black in the middle of the night I flip the killswitch instead so my running lights give me a little light to take off my gear.Add me to the list of people whose fan comes on at around 210F. For everyone who has their fan come on after they shut their bike off - really? I'm pretty sure when I shut my bike off (I shut my bike off by turning the ignition off with the key), the bike shuts off, fan and all.
And as someone else noted, the temperature continues to go up for a while because there is no coolant flowing through the engine to actually cool it. It looks like the water pump is mechanical (BikeBandit picture), so no engine spinning would mean that the water pump isn't spinning either.
How are you shutting off your bike such that the fan turns on or continues to run?
Here's how a radiator works. Many other explanations as well; google is your friend
The fan should be running when you get above 210F. You probably cannot hear it over the motor or through your helmet. Plus, once you turn off the engine, coolant stop circulating and the head temp climbs above 210 and kicks on the fan.
Whew as well, however leaves up in your fairings? lol
How in the hell? LOL! At least it ended up being an easy fix.
Where i live, my fathers '12 toyota camry has a S*** ton of leave, twigs and other things STUFFED in the cabin and engine air filter. And i truly mean stuffed. I had to go fishing for every bit in the cabin fan... I live in woods. Leaves can be found in the strangest and hardest to clean places...
Hmm, id look into a $20 cover at minimum. if its that bad id actually look at a shack or something but cover at least.Where i live, my fathers '12 toyota camry has a S*** ton of leave, twigs and other things STUFFED in the cabin and engine air filter. And i truly mean stuffed. I had to go fishing for every bit in the cabin fan... I live in woods. Leaves can be found in the strangest and hardest to clean places...
But you tend to live with it