I've an 05 636 C1H (European), I've been lurking here for a couple of weeks, I noticed at the end of last summer that the bike overheated a couple of times (cut out on me once), and then I put it away for the winter, and forgot about it.Took it out again this year, made it to the end of the driveway before I noticed that the brakes were gone. (oopse.), and then did the rounds of checks, and noticed that the reading on the dash can get up to 103/104ºC (217/219ºF), without the fan having kicked in.Fortunately I'm comfortable stripping the bike and repairing things myself, I've so far stripped it down to be able to remove the water temperature sensor, and to verify that the fan motor does indeed work, of course along the way I also checked the fuse, and even for kicks replaced the fuse anyway.I've had the temperature sensor out today, and tried to test it, unfortunately working in the cellar I didn't have access to the internet to check the expected resistances on the three pin variant of the temp sensor, but I can attest to the values of the sensor changing as the water boiled.I'm wondering if it's worth pulling the thermostat (risk of damaging a gasket), or if the fact that I can read the temperature on the dash should mean that the reading is correct. (Removing the thermostat: https://www.dropbox.com/s/cojb0g0x6s2p5wj/Screenshot 2014-04-26 21.52.39.png The water temperature sensor (diagnostic: https://www.dropbox.com/s/p9warkpndoodh8c/Screenshot 2014-04-26 21.54.18.png , and https://www.dropbox.com/s/t8v83v92jy4fzq7/Screenshot 2014-04-26 21.56.56.png ) seems like it's working, but I'll pull it again tomorrow and verify that it's all working according to the spec sheets.Can anyone tell me *what system* decides when to activate the fan, does it run over the same system as the reading on the instrument panel, or is there another sensor I'm missing? (it seems to be a variable thermistor, rather than a normally open thermal switch?) But I'm not clear on the purpose of the 3rd ground pin.I'm also not sure how best to proceed. The cooling system is in generally good order (I've checked the radiator, it was flushed professionally previously, 1200 miles since that was done, fine weather only bike, so during my debugging it's running pure distilled water), that said the bike has done 32,000Km (19,880 miles).Thoughts more than welcome, I think I'll resort to replacing at least the fan switch (part number #21176B ?)Anything anyone can suggest will be gladly received, I'm trying to avoid a hefty workshop bill for debugging all this crap, I've already got 4 happy-as-hell hours in, and I'm glad not to hand that money over to my local Kawasaki dealership!