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Crrider3579
Posted on Wednesday, September 11, 2013 - 01:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

First time posting here but have been visiting since I've had my CR. It's an '09 that sat for three years after being re-po'ed and never ridden. I scored it for $4000 bucks with 1 mi on the original cluster. I just recently rewound my stator, installed the EBR upgraded battery and replaced the starter solenoid that went bad. My current issue is that I do a lot of short, run-around riding during the workday and with it being hot the fans stay on well after I kill the engine. Today my battery, which is only a month old, quit on me. After pulling it and tending, it still holds a charge and the stator is still cranking out adequate voltage.

My two thoughts at this point are:

(1) Install a fan cut-off or battery disconnect switch to stop the fans from draining the battery once the bike is off.

or

(2) I didn't spring for a new regulator when I rewound the stator. Could this problem possibly be from the VR bleeding off excess power and not allowing the battery to soak up as much as it needs?

Not sure how much of an effect Option #1 would have on the wear and tear of the cooling system. Any thoughts or advice from past experience would be greatly appreciated.

Thanks
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Jimustanguitar
Posted on Wednesday, September 11, 2013 - 02:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The fans run on purpose after you shut it off, I wouldn't mess with that at all. With a stock (or aftermarket) gel cell or deep cycle sealed type of battery like these bikes have, the fans running for several minutes (or even considerably longer) is not the kind of electrical draw that would cause a problem like this.

I can't speak with experience specific to internal-combustion cooling systems, but I have some general knowledge about how active cooling works in other applications... Lots of things run fans after shutdown because all of the heat hasn't migrated into where the cooling system can "reach" it yet. For example, the combustion chamber might be 600 degrees (made up number) but that's 1cm away from the 200 degree cooled water jacket. If you stop actively cooling the water, that 600 degrees will spread out into its surroundings and can make things hotter than before the engine stopped. There isn't necessarily "new" heat, it's not any hotter than before, but the higher temperatures are allowed to spread out more than when they were being cooled and it can heat up things that aren't designed to take the heat...

Anyway, I'm sure this is up for debate, but my vote is for not disabling the fans. I'd look for another culprit and solution.
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Sportster_mann
Posted on Wednesday, September 11, 2013 - 04:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It may not be the fans, but the short journeys that are causing the problem - starting the bike takes a lot from the battery and it takes quite a few miles just to replace that charge.

The solution ? Get a battery tender and plug it in when when you park it up for the night.

And it wouldn't hurt it to always use the kill switch if you don't already.
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