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post #1 of 12 Old 12-14-2008, 4:16 PM Thread Starter
 
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f4i fan problems

so I picked up an f4i but the fan wont turn on any advise on how to trouble shoot this problem would be great thanks! and at what temp is the fan supposed to kick on at?? thanks
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post #2 of 12 Old 12-14-2008, 5:47 PM
 
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Re: f4i fan problems

The fan does not kick in till between 98 to 102 degs C.
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post #3 of 12 Old 12-14-2008, 6:22 PM
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Re: f4i fan problems

Check to see if the fan can freely spin (Do not start - just spin her with your hand), make sure she is getting power (if yes could be the switch)

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post #4 of 12 Old 12-15-2008, 1:58 PM Thread Starter
 
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Re: f4i fan problems

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Originally Posted by Twincam View Post
Check to see if the fan can freely spin (Do not start - just spin her with your hand), make sure she is getting power (if yes could be the switch)
yeah the fan can freely spin. how do i check the switch?
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post #5 of 12 Old 12-18-2008, 4:27 PM
 
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Re: f4i fan problems

Key on, unplug the wire from the temp switch and ground it, if the fan comes on, everything is tested as good except for the switch. The easiest way to test that, IMHO, is with a laser thermometer, crank the bike, take it for a ride to warm it up, then bring it back and let it idle till the temp gets above the switch "on" temp, either the fan should come on, or you can POWER a test light and see if it gives you ground at the switch terminal with the wire disconnected.

Last edited by Rickracer; 12-18-2008 at 4:38 PM.
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post #6 of 12 Old 12-18-2008, 4:34 PM
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Re: f4i fan problems

Basically what Rick said, you need to give it a seperate feed to test the motor.

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post #7 of 12 Old 05-21-2012, 11:08 PM
 
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Re: f4i fan problems

I have a Honda CBR 600 f4i 2005 the fan was working fine but one day didn't work. I change the fan and the relay but the fan wont turn on. I check the electric continuity and have electric power and the negative is working too. Which is the maximun temp that could raise to turn it on? Any advise on how to trouble shoot this problem would be great thanks!
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post #8 of 12 Old 05-21-2012, 11:21 PM
 
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Re: f4i fan problems

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Originally Posted by desimonde View Post
I have a Honda CBR 600 f4i 2005 the fan was working fine but one day didn't work. I change the fan and the relay but the fan wont turn on. I check the electric continuity and have electric power and the negative is working too. Which is the maximun temp that could raise to turn it on? Any advise on how to trouble shoot this problem would be great thanks!
This thread is super old but I have an F4i and my fan doesn't turn on until 225 degrees F.

02 F4i track build-fully built motor, 600rr swinger and rear master, 1000rr front end and rear shock, akra full exh, pcIII and ign module, HRC radiator and quick throttle, brembo fr master and more
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post #9 of 12 Old 05-22-2012, 8:02 AM
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Re: f4i fan problems

Quote:
Originally Posted by desimonde View Post
I have a Honda CBR 600 f4i 2005 the fan was working fine but one day didn't work. I change the fan and the relay but the fan wont turn on. I check the electric continuity and have electric power and the negative is working too. Which is the maximun temp that could raise to turn it on? Any advise on how to trouble shoot this problem would be great thanks!

The fan comes on just past boiling point.

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post #10 of 12 Old 05-26-2012, 6:27 PM
 
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Re: f4i fan problems

Just bypass it and have it direct like i do, i have mine with a kill switch after the bike is warmed up i turn on the fan.. never had any problems like that
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post #11 of 12 Old 05-26-2012, 8:40 PM
 
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Re: f4i fan problems

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Originally Posted by 2WheelFury View Post
This thread is super old but I have an F4i and my fan doesn't turn on until 225 degrees F.
That's about normal. On my F4i, the fan never used to come on until about 103 or 104. You can always wire up a switch in PARALLEL to the wires on there to switch it on manually if you get stuck in traffic.

edit: From stunt-life forums:

Find the wire that goes to the thermostat on the radiator. You will know it is the wire if you pull it out of the thermostat and ground it and the fan comes on (of course the ignition has to be on). Take a scotchlock to tap into this wire and run it to one side of a SPST switch and run the wire on the other end of the switch to any ground. This way with the switch on, the fan will be always on and if the switch is off it will run like stock and you will not forget and overheat your bike just riding around.

If the bike isn't braking properly, you don't start by rebuilding the engine.

Last edited by Sky91; 05-26-2012 at 8:47 PM.
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post #12 of 12 Old 05-27-2012, 10:28 PM
 
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Re: f4i fan problems

Quote:
Originally Posted by Sky91 View Post
That's about normal. On my F4i, the fan never used to come on until about 103 or 104. You can always wire up a switch in PARALLEL to the wires on there to switch it on manually if you get stuck in traffic.

edit: From stunt-life forums:

Find the wire that goes to the thermostat on the radiator. You will know it is the wire if you pull it out of the thermostat and ground it and the fan comes on (of course the ignition has to be on). Take a scotchlock to tap into this wire and run it to one side of a SPST switch and run the wire on the other end of the switch to any ground. This way with the switch on, the fan will be always on and if the switch is off it will run like stock and you will not forget and overheat your bike just riding around.
I thought about doing something like that. Normally traffic isn't too bad unless it's rush hour when everyone is heading home. Thanks Sky

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