is it better to let the fan stop running? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 17 (permalink) Old 05-10-2007, 08:56 AM Thread Starter
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is it better to let the fan stop running?

After you shut the ignition off my fan still runs since it has been hot outside. This is probably due to the time it takes me to park the motorcycle into the garage after riding. My question is should you leave the key in the ignition in the first postion until the fan completes the cycle or just remove it and have the fan cut off early. Does it make any difference for the longevity of the motor?
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post #2 of 17 (permalink) Old 05-10-2007, 09:51 AM
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The fan will keep running with the key out if it needs to. At least mine does - and others have mentioned the same. It'll shut off when it needs to.

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post #3 of 17 (permalink) Old 05-10-2007, 09:57 AM
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Fan runs independant of the key, if thermal switch says turn on, the fan is on.

One reason why you disconnect the battery before working on it.

Jon

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post #4 of 17 (permalink) Old 05-10-2007, 10:09 AM Thread Starter
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I am not doubting your folks word but maybe my bike needs to be looked at. When I shut the bike off but the ignition key is still in the first postion(lights all work) the fan stays on. If I turn the the key off the fan stops running. This has been done several times over so I don't think it is a coincidence. The bike is a 06 but maybe I need to let the shop look at it. Thanks for the replies.
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post #5 of 17 (permalink) Old 05-10-2007, 10:16 AM
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Are you using the key to shut off the bike, or the kill switch on the right controls? If using the kill switch, that's why your lights stay on, you haven't turned off the ignition yet. If you are using the ignition to turn off the engine but the lights stay on, either you're turning the key too far to the left, Park position maybe, or something is just wrong with the ignition switch.

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post #6 of 17 (permalink) Old 05-10-2007, 10:31 AM Thread Starter
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My lights are on appropriately, I was just stating that so everyone would know which postion the key was in (motorcycle not running and fan and light are running). Sorry for the confusion. I really don't mind waiting for the fan to stop running before turning the key all the way off but was concerned about the battery. I purchaced a maintenance free battery along with several other add on goodies but between the kids and work have not been able to chisel enough time to put them on. I really appreciate the help from everyone on this board. I have been on other nonrelated boards and the people on those are not nearly as helpful as this group.
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post #7 of 17 (permalink) Old 05-10-2007, 10:37 AM
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You don't need to keep your lights on for the fan to run, unless something is wrong. I guess I'm still confused. You're turning off the key and the fan quits? If you turn the key back on immediately does the fan come back on?

Are you using the kill switch to kill the engine? Or the key?

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post #8 of 17 (permalink) Old 05-10-2007, 11:09 AM Thread Starter
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I am using the kill switch to stop the engine. I then turn the key from run to the left which leaves the lights(neutral finder ect on) and the fan continues to run. When I then take the key and turn to the left into the position that it can be removed the fan stops running immeadiately(as if power to the fan has been cut). I have not, and it is a good point, tried to turn the key back on to see if the fan then starts running again. I rode the bike to work today and I will try this when I get home. Thanks.
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post #9 of 17 (permalink) Old 05-10-2007, 02:22 PM
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Even if the fan cuts out, it is only drawing air through the radiator. If the engine is not running, there is no water circulation through the engine so the fan shutting off won't hurt the engine. The radiator will take longer to cool though.

Jim W
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post #10 of 17 (permalink) Old 05-10-2007, 10:23 PM
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A couple of comments;
1) If the fan runs with the engine off, it will still continue to move air across the engine, slightly helping it to cool. Corretc?
2) I have heard that turning the engine off with the key could cause the contacts inside the key switch to arc and possibly prematurely fail. Not real sure about this one, but as long as I have a run switch, I prefer to use it instead of the key.

Thoughts?

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