Cooling fan. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 9 (permalink) Old 06-01-2016, 11:24 PM Thread Starter
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Cooling fan.

So I've noticed my cooling fan doesn't come on when I'm riding. It waits till I turn off the bike. The bike had been heating up a bit. Just looking for help.
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post #2 of 9 (permalink) Old 06-02-2016, 01:04 AM Thread Starter
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When should my cooling fan be on?
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post #3 of 9 (permalink) Old 06-02-2016, 09:11 AM
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Might be due to the aftermarket (loud) pipes, but I can't hear the fan when the bike is running. The fan is often running when I shut the bike off, and will stay on 15-30 seconds until the temp drops. I assume it's on while riding, as the temp gauge has never gone above 1/2.

1995 VN750 bought used @ 6K miles (sold @ 20K miles)
2007 VN1600D bought used @ 40K miles
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post #4 of 9 (permalink) Old 06-02-2016, 09:36 AM
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I have stock pipes and rarely hear mine run while riding.. in reality, it should only come on if your standing still, or going less than 20 or so, as otherwise airflow thru radiator is enough to do the job.

also, it is normal to come on for a short time on shutdown..

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post #5 of 9 (permalink) Old 06-02-2016, 12:53 PM Thread Starter
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My pipes are stock. It does come on after I stop like it should. The bike is heating up way passed 1/2. I've replaced a few hoses and the coolant.
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post #6 of 9 (permalink) Old 06-02-2016, 01:15 PM
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the fact that it comes on when shut off tells me the circuits are good..

**NOTE** it should only come on at shutdown if the temp is high enough.. a cold or only warm engine wont turn on the fan at shutdown

as a verification, you can connect the wire from the coolant switch (on bottom of radiator) to a good ground, fan should run.

it could be the temp sender for the gauge is out of tolerance, causing it to read higher than it really is. this is on the thermostat housing, under the tank/right side neck cover.

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post #7 of 9 (permalink) Old 06-03-2016, 02:49 AM
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Quote:
Originally Posted by michiganteddybear View Post
I have stock pipes and rarely hear mine run while riding.. in reality, it should only come on if your standing still, or going less than 20 or so, as otherwise airflow thru radiator is enough to do the job.

also, it is normal to come on for a short time on shutdown..
Same here. For now I am running stock pipes (though the right muffler has a gigantic tear in it so I suspect the sound is amplified quite a bit) and I can barely hear the fan when riding. Mine seems to turn on when the temp gauge is around 1/3 or so, maybe a little above that.

My bikes:
2017 Kawasaki Z1000SX Tourer
2002 Suzuki DR-Z400S
1999 Yamaha Dragstar 1100
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post #8 of 9 (permalink) Old 06-03-2016, 12:39 PM
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Mine doesn't come on at all if the bike is moving

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post #9 of 9 (permalink) Old 06-23-2016, 09:28 PM
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I installed a blue LED light and ran one wire to ground and the other wire to the thermal switch now when ever my fan is running the blue LED is on and I know when the fan is running I drilled a small hole on the top of the head light bucket and cemented the LED in place from the inside. I always know when the fan is running now

!995 1989 VN750 Both bikes have identical accessories. Rear facing cameras with windshield mounted color monitors. Hard saddle bags. Tire pressure monitors. All recommended mods. Removable rear trunks with alarms. Ground facing LED Kawasaki logo illuminate with brake lights .
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