When should fan come on? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 11 (permalink) Old 05-20-2011, 01:12 AM Thread Starter
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When should fan come on?

Both my manual and the PDF manual someone here posted say that the fan should come on when the water temp gauge is in the "HOT" range. Which range is HOT? Is it the red on the far right? Is is anything past the "C"?? My bike tends to start to heat up when stopped but I still have cooling system work to do on it.

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post #2 of 11 (permalink) Old 05-20-2011, 02:13 AM
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The fan should come on long before it gets to the right side. Mine comes on when the needle is right in the middle of the guage. What I did was let mine sit and idle till the fan come on to make sure the fan switch and relay was working.
When I'm riding it the needle rarely gets past the second hash mark on the cold side.
When idling they will heat up a bit, but after you take off it should cool down.
As it gets hotter outside and the ambient temp comes up, they will naturally run hotter, but from what I have read, they still tend to run cooler than most.
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post #3 of 11 (permalink) Old 05-20-2011, 07:52 AM
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my fan comes on when the needle on the gauge is in the middle too.

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post #4 of 11 (permalink) Old 05-20-2011, 07:54 AM
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Depends on where you're from, which we don't know. If you ride in Antartica, it'll prolly never kick on. If you ride in Hades, it'll be on all the time.

You'll hear it kick on when stopped at a light. It'll prolly be 99 degrees and humid that day. You'll feel her blow all that engine heat back on ya, successfully completing the seemingly impossible task of making you even hotter than you already were. I call it "the kiss." It's kinda like when a dog jumps on you and licks your face. It's gross but you still smile. For some reason it's still kinda nice and maybe even a little fun. The bike is sort of sayin' "Hey, I know this sucks but you wanna ride so I'm doing my job." Personally, I love it.

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post #5 of 11 (permalink) Old 05-20-2011, 09:22 AM
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LibertyPilot-
Love it!!!

FWIW, the fan terminal towards the bottom of the radiator will get gunked up with road grime and fail to make contact. My bike overheated one summer stopped in traffic because my fan failed to come on. I ended up unplugging the wire, cleaned it all up (make sure to use dielectric grease) and have been good to go since.

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post #6 of 11 (permalink) Old 05-20-2011, 09:38 AM
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post #7 of 11 (permalink) Old 05-20-2011, 11:56 AM
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Mine kicks on when it gets to half way on the gauge too.

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post #8 of 11 (permalink) Old 05-20-2011, 06:55 PM
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mine does at half way as well

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post #9 of 11 (permalink) Old 05-21-2011, 12:39 AM
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A while back, some folks in here were using a product called Water Wetter (I believe) to add in their coolant. From the reports, they did indicate a slight drop in the gauge temp when riding, but I believe they still had the typical heat ups while sitting idling in summer. I have thought about giving it a shot in my bike because when sitting in traffic, even with the fan on barbecuing my legs, it still gets too close to the red line for my comfort. Never overheated (when working properly), but sure seems determined to get there...

Ben-
SW Ohio

'02 VN750
Pipes drilled
Spline lubed
R/R relocated
AGM batteried
Iridium equipped
LED tail lighted
8000-ish miled
Soon to be MCCTed

Lovin Life.
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post #10 of 11 (permalink) Old 05-21-2011, 04:36 AM
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YES......I seriously recommend running Water Wetter by REDLINE. I run a 2 oz of Water Wetter per 1 QT of Distilled Water. It has ran much cooler since doing this on the road at highway speeds and in no go traffic. That is my summer mix. In winter you need to have the proper amount of antifreeze to keep the water from freezing (Water Wetter is not an Antifreeze at all). Go to Google and search Water Wetter for more info on this great product(it is pink/red in color). Also Gunk has there version for sale (I believe it does the same thing but it is green in color).
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