891 SC28 When the radiator fan kicks in ? - Honda Motorcycles - FireBlades.org
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post #1 of 5 Old 12-02-2009, 8:02 AM Thread Starter
 
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891 SC28 When the radiator fan kicks in ?

Hello, I just got a used '95 SC28 CBR900 and I am trying to figure out when the radiator fan is supposed to start working. The bike does not have a digital temperature meter. It has an analog gauge with a red zone at the end.

I saw the needle going all the way just before touching the red zone but the radiator fan never kicked in. Is that normal or do i have a temperature sensor problem ?
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post #2 of 5 Old 12-02-2009, 8:29 AM
 
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Re: 891 SC28 When the radiator fan kicks in ?

sounds like the fan switch/or the fan it self has failed, also check the fuse, the switch is the part that screws into the radiator, make sure its all connected up ok. To check the fan, disconnect the wire from the switch to the left of the rad, turn on the ignition, and earth the switch wire, as the wire is earthed the fan should come on, then you know the fan is ok, and you just need a new fan switch, if the fan dont come on you need a new fan.
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post #3 of 5 Old 12-02-2009, 8:38 AM
 
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Re: 891 SC28 When the radiator fan kicks in ?

and fan normally kicks in between halfway and three quarters on the gauge.
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post #4 of 5 Old 12-02-2009, 2:37 PM
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Re: 891 SC28 When the radiator fan kicks in ?

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Originally Posted by cbr zoo View Post
Hello, I just got a used '95 SC28 CBR900 and I am trying to figure out when the radiator fan is supposed to start working. The bike does not have a digital temperature meter. It has an analog gauge with a red zone at the end.

I saw the needle going all the way just before touching the red zone but the radiator fan never kicked in. Is that normal or do i have a temperature sensor problem ?
The fan would come in just after boiling point so around 102C I'd guess.
My ZX6R has an eight-block LCD gauge. It normally runs in the third block and the fan comes on at the fifth block. I'd guess the halfway mark is around the 100C mark.
Try connecting power directly to the fan and see if it works. If it does then look at the wiring and the fan switch.

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post #5 of 5 Old 12-04-2009, 7:36 AM Thread Starter
 
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Re: 891 SC28 When the radiator fan kicks in ?

Thank you for the advice guys. Will try and get back to you.
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