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When should the radiator fan kick in?

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GREENI3
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Joined: 26 Nov 2010
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PostPosted: 14:56 - 14 Sep 2012    Post subject: When should the radiator fan kick in? Reply with quote
I had my bike idling for about 15/20 mins and the needle got quite close to the thick white line just before the red zone and the fan didn't come on.

https://i.ebayimg.com/t/GENUINE-HONDA-CB500-CB-500-CB500R-1995-REV-COUNTER-TEMP-GAUGE-FREE-UK-POST-/00/s/MTIwMFgxNjAw/$T2eC16hHJHYE9nzpgI-DBQIo2fL9,w~~60_35.JPG

When should the fan kick in at?
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carvell
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Joined: 05 Sep 2003
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PostPosted: 15:06 - 14 Sep 2012    Post subject: Reply with quote
It's different for all bikes. The TDM 900 fan doesn't kick in until the needle is pretty much in the red.

To test the fan, find your thermostatic switch and connect the wire on it to the frame. That will make the fan come on.
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janner_10
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Joined: 26 Sep 2011
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PostPosted: 16:37 - 14 Sep 2012    Post subject: Reply with quote
It wont kick in, your temp gauge isn't attached to the bike Laughing Laughing
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carvell
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Joined: 05 Sep 2003
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PostPosted: 16:38 - 14 Sep 2012    Post subject: Reply with quote
janner_10 wrote:
It wont kick in, your temp gauge isn't attached to the bike Laughing Laughing

The temperature gauge has nothing to do with telling the fan to go on and off. Razz
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janner_10
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Joined: 26 Sep 2011
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PostPosted: 16:39 - 14 Sep 2012    Post subject: Reply with quote
Thats a good point! Joke failed.
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weasley
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Joined: 16 Oct 2010
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PostPosted: 16:50 - 14 Sep 2012    Post subject: Reply with quote
A workshop manual might tell you the temperature the fan switch trips at. On the Thundercat the engine is basically starting to melt before the fan cuts in.

@janner_10... I got it! Laughing
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MAR5H7
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Joined: 23 Jan 2012
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PostPosted: 17:30 - 14 Sep 2012    Post subject: Reply with quote
weasley wrote:
On the Thundercat the engine is basically starting to melt before the fan cuts in.


I should bloody hope not O.O lol

Like my Thundercat running nicely
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