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Keep your bike a little cooler this summer - manual fan switch install
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Keep your bike a little cooler this summer - manual fan switch install - May 30, 2009, 06:44 PM

I did this today and figured I would share as it is an easy mod that is pretty nice in traffic or other places where your bike doesn't get enough airflow to cool it properly.

Note/Disclaimer: I have done this to several bikes, it has always worked fine with no problems, but do it at your own risk. That said, essentially all you are doing is overriding the ground in the fan relay so the fan kicks on manually. With this mod, your fans will operate normally, its just you will have the option of flipping them on when you know its going to need it. In this mod there is no power re-routing - just a simple SPST switch and 2 wires.

First step: Get a SPST switch ($2.99 @ Radioshack) and attach the 2 wires you are going to use. Make sure they are long enough to reach your ground source.

http://www.radioshack.com/product/in...ductId=2062523

Second step: Locate Fan Relay; on my 06 CBR1000rr and my 05 R1 they were located behind the left fairing. See pic C1

Third Step: Determine the fan relay ground - on the 06 cbr 1000rr it is the gray wire with blue stripe, on the r1 it is a green/yellow wire. Se pic C2

Fourth Step: Mount your switch wherever you want it, and attach one of the wires to a ground (I used a bolt on the frame) and the other to the fan relay ground wire (you can splice it in or just force it into the same little hole as long as you have a good connection to that wire). Turn the ignition on and test it out. It will only work with the ignition on. See Pics C3 & C4

Fifth Step: secure all wires so they wont come loose under vibration/bumps and put fairings back on. See pic C5. Done.


[IMG]file:///C:/Users/Brandon/Desktop/Motorcycle%20Stuff/CBR1k%20pics/C1.jpg[/IMG]
Attached Images
File Type: jpg C1.jpg (32.6 KB, 56 views)
File Type: jpg C2.jpg (28.1 KB, 51 views)
File Type: jpg C3.jpg (272.3 KB, 46 views)
File Type: jpg C4.jpg (46.9 KB, 45 views)
File Type: jpg C5.jpg (41.2 KB, 51 views)
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May 30, 2009, 06:53 PM

thats pretty cool..so the fan still comes on normally when it hits its regular trigger temp? You just have the option of turning it on early right?


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May 30, 2009, 06:59 PM

yep
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May 30, 2009, 07:01 PM

Quote:
Originally Posted by sasha00311 View Post
thats pretty cool..so the fan still comes on normally when it hits its regular trigger temp? You just have the option of turning it on early right?
correct


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May 30, 2009, 07:03 PM

very nice


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? - May 30, 2009, 07:13 PM

Thanks!
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May 30, 2009, 07:34 PM

I made one for my Vmax. Works great. Takes 10 minutes and $8. I wired mine directly to the fan temp switch.


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May 30, 2009, 07:52 PM

I was actually just about to look this up.My bike is overheating something nasty.Will it do any harm to just leave it on all the time?


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June 1, 2009, 08:21 AM

yeah, it might drain the battery it you run it constantly. You probably have other problems if its overheating constantly - check your fluids
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June 1, 2009, 08:24 AM

This is one of the best threads of the year.


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June 1, 2009, 10:13 AM

I just run Gatorade in mine, its that simple.


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June 1, 2009, 10:26 AM

Quote:
Originally Posted by C2H5OH View Post
I was actually just about to look this up.My bike is overheating something nasty.Will it do any harm to just leave it on all the time?
a naked bike should not be overheating something nasty. our bikes are naturally hot heads, but on a hot ass day while sitting, you should only be around 220 or so....then the temp should fluctuate between 213 and 222 at most. I think my fan kicks on at 215 or so. Then when you ride, obviously it'll drop tremendously.

i'd check ur fluid, ur thermostat, maybe ur water pump, air filter etc etc.

Last edited by Oneway; June 1, 2009 at 10:29 AM..
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June 1, 2009, 11:38 AM

Awesome, thanks Brandon! Aircooled bikes need this for real, gonna be on the whole commute home.
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June 1, 2009, 12:37 PM

I just filled with H20 + water wetter and riding all day on Sunday, the temps were between 175-205ish....like 10degrees cooler than antifreeze at idle (stop lights) and like 20degrees while running...


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June 2, 2009, 05:17 AM

yup, running engine ice in my R1, while cruising temps are around 158-169. If I flip on my fan switch I can keep the temps under 190.


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