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Cooling Systems Cooling Systems - Radiators, Water Pumps, Fans, Coolant, etc.


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March 8th, 2009, 05:56 AM   #1
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oem fan

do many people use the fan. Does it work all the time, or kick in at a certain temperature. Have not seen it of the wec bikes. What is meant to be the main benefit?
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March 8th, 2009, 07:55 AM   #2
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The OEM fan works off a thermostatic switch in the bottom of the radiator. On pre 09 bikes the fan runs when ever the motor is over temperature, running or not. On the 09 bikes the fan will shut off when the motor is off reguardless of the temperature.
I know some of the WEC bikes were running the OEM in 06. Perhaps they only install them for specific events.
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March 8th, 2009, 10:08 AM   #3
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On '09 bike the fan works great. It starts on 100 degrees and stops on 95. When the engine is stopped the fan stops, which is good for preserving the battery. You need a fan if you are riding slowly on first or second gear for 5 min or more in warm weather.
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March 8th, 2009, 07:35 PM   #4
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Did you get the fan with the new bike or you bought it separately?
280$ it's a lot of $ for a fan...my 250F came with one, and anyway the KTM one cost around 100$...
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March 8th, 2009, 08:04 PM   #5
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I bought the earlier model fan kit, pre 09 and installed it on my 09. It is about 1/2 the price of the 09 model. The only difference is the way the fan mounts. It looks like you are paying alot more for a silly little bracket.
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March 8th, 2009, 08:09 PM   #6
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Originally Posted by berger
I bought the earlier model fan kit, pre 09 and installed it on my 09. It is about 1/2 the price of the 09 model. The only difference is the way the fan mounts. It looks like you are paying alot more for a silly little bracket.
Does it switch off when the motor is off like the 2009 one?

Thanks!

Yoram
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March 8th, 2009, 08:18 PM   #7
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The power relay controls the fan off with the engine off on the 09.
On my 06 it will run for alittle while after the motor is off when it's hot. It has never been an issue. I do keep my battery fully charged when not in use though.
I suppose you could wire in an additional switch if you thought it would be a problem. so far for me, no problem.
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March 9th, 2009, 12:25 AM   #8
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Originally Posted by MexMex
Did you get the fan with the new bike or you bought it separately?
280$ it's a lot of $ for a fan...my 250F came with one, and anyway the KTM one cost around 100$...
I got is for 120 Euro after I got the bike.
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March 9th, 2009, 12:54 AM   #9
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That is a lot of money for such a simple device (and bracket). Are computer cooling fans suitable for this application?
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March 9th, 2009, 01:04 AM   #10
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Originally Posted by uaeberg
That is a lot of money for such a simple device (and bracket). Are computer cooling fans suitable for this application?
No. The power of a standard computer fan is about 10-30% of original fan. Computer fans are not water and mud resistant and normally works only a couple of rides. The only computer fan I have had good experience with was one Intel fan from server machine, which worked for 2 years! However this was very expensive fan $50+ USD. And still the power was about 1/2 of the Husaberg/KTM fan. The good was that it was 10 times less weight.
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