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Author Message   Xodot Posted on Friday, October 30, 2009 - 12:18 am:        I was riding today in 11 degree Celsius (51F)air temp and the bike only got to 74C degrees (165F)unless I was stopped for a few moments when it would rise to 85C (185F)degrees. I thought they might have a thermostat to keep the engine temperature at a higher operating temp in the cold weather.   Jdugger Posted on Friday, October 30, 2009 - 07:51 am:        They do. The thermostat will kick on the fans and coolant pumps at about 175F.   Xodot Posted on Friday, October 30, 2009 - 08:51 am:        Sorry , I see now my question was a little awkwardly worded. What I want to know is if the thermostat will help the engine operate at normal temperatures (about 175F) by reducing or stopping the engine coolant flow to the radiator in cold weather like my car does. Isn't 165F below optimal engine running temp?   Jdugger Posted on Friday, October 30, 2009 - 08:52 am:        Yes. When the motor is cold it does not circulate coolant.   Averagejoe Posted on Friday, October 30, 2009 - 09:35 am:        Along these coolant questions I have one. Why do these fans run all the time, it seems like they wouldnt be needed until up around 190 at the lowest. Just seems like un needed draw on the charging system, and wear and tear on the fans.   Nivek Posted on Friday, October 30, 2009 - 09:51 am:        I thought i have read on hear before that the fans dont kick on until about 170 F for one fan and 180 F for the second. I have noticed that my fans do turn on and off. Right now my bike is running around 165 F with air temp between 45-55 F. (New england weather) I've assumed that optimal running temp is above 150 F, only because that is when the temp stops flashing on the cluster, indicating the bike is up to temp, according to the manual, when the bike is first started. -Nivek   Jdugger Posted on Friday, October 30, 2009 - 10:35 am:        Fans only run when the bike is hot.   Poppinsexz Posted on Friday, October 30, 2009 - 11:28 am:        I think I read in the SM that the thermostat opens at 165F.   Blur Posted on Friday, October 30, 2009 - 03:21 pm:        Typically once the thermostat opens, even if the bike cools off a little if its still running it'll stay open until it gets "cold" again.   Oldog Posted on Friday, October 30, 2009 - 05:32 pm:        Yes. When the motor is cold it does not circulate coolant. Not entirely accurate, the thermostat closes off and the cylinders and heads are recirculated by the pump, once up to temp the thermostat opens and the coolant circulates through the radiators. first one side (right I think) then the other, ( they are "in series" ) }   Xodot Posted on Saturday, October 31, 2009 - 01:23 am:        Thank you gents, that certainly helps me understand what is happening with those temperature variations. Cheers, XO.

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