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October 17th, 2009, 07:50 AM   #1
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2010 FE 450

I keep my bike on a battery tender between rides. Sometimes this can be a few weeks. As you guys may or may not know you have to disconnect the negative while on the tender or the fuel pump will cycle as the ECU sees an excess charge as an attempt to start.

The question is, with the ECU off line for long periods is it necessary to do the 15min run in required to set the EFI parameters?


Talk amongst yourselves.....
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October 17th, 2009, 08:04 AM   #2
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Interesting, I did not know that, I had a battery tender hooked to my 09 FE450 and never experienced any problems, I'm not saying the fuel pump did not cycle, I just was not aware of this condition. I haven't hooked it to my FE570 yet. Is this a 2010 thing or would it be something that effects both years? I would think the answer to the original question is yes, but it's a 5 min run in at idle for relearning.
Mark @ SOS
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October 17th, 2009, 08:39 AM   #3
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Yes it effects the 09 fe570 as well. I personally dont think the ECU has to be relearnt. I am presuming it would keep the same parameters if you replaced the battery , for instance.
Anyway , to avoid all that, simply unplug the pump/efi connector before charging and leave the battery con nected.
This is the white connector between the two fuses (no cover), its opposite the negative terminal.
When you have finished charging, simply plug it back in.

Cheers,

Nick
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October 17th, 2009, 08:52 AM   #4
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Why not just unplug the fuel pump connector under the seat? That's what I do. When you disconnect the tender, just plug it back in before putting the seat back on?
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October 17th, 2009, 12:42 PM   #5
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All good points fellaz. I went with the un-plug the negative route for a couple of reasons.

1. Did not want to wear out FI connector by pluggin un unplugging it. I realize this is unlikely, but, replacing this plug would be harder and more expensive than the fasteners in the battery.

2. I would rather have all the electrics off line for battery maintenance. I noticed when I just unplugged the FI connector that the rectifier(mounted near head tube on left) would still cycle on and off with a clicking sound.

I think you guys are right though, the ECU should not forget where it was last set.

Thanks....
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October 17th, 2009, 12:49 PM   #6
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The clicking sound you hear is the power relay.

This situation only occurs during the peaking portion of the newer style battery tender, this occurs when the battery reaches a certain voltage, like 13.2 and then increases and decreases the voltage for a while then it stops.

I have never just left it on there to see how many times the fuel pump will cycle it may only happen a couple of times. Maybe just hook it up and monitor it for a bit and see what happens?
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October 17th, 2009, 05:01 PM   #7
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I will and let you guys know...
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October 18th, 2009, 05:09 AM   #8
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The fuses under the seat are very accessible, why not just unplug the appropriate ones?

Thanks for the info, I didn't know the bike did this as I ride mine at least several times a month and will into the winter at least until it starts snowing, which is not very often here - so I don't feel the need to use a battery tender.
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October 18th, 2009, 05:53 AM   #9
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Originally Posted by DaleEO
The clicking sound you hear is the power relay.

This situation only occurs during the peaking portion of the newer style battery tender, this occurs when the battery reaches a certain voltage, like 13.2 and then increases and decreases the voltage for a while then it stops.

I have never just left it on there to see how many times the fuel pump will cycle it may only happen a couple of times. Maybe just hook it up and monitor it for a bit and see what happens?
I wonder how the new Bergs would respond to Li Ion batteries, as their standing voltage is ordinarily above 13.2.
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October 18th, 2009, 05:53 AM   #10
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Originally Posted by DaleEO
The clicking sound you hear is the power relay.

This situation only occurs during the peaking portion of the newer style battery tender, this occurs when the battery reaches a certain voltage, like 13.2 and then increases and decreases the voltage for a while then it stops.

I have never just left it on there to see how many times the fuel pump will cycle it may only happen a couple of times. Maybe just hook it up and monitor it for a bit and see what happens?
I wonder how the new Bergs would respond to Li Ion batteries, as their standing voltage is ordinarily above 13.2.
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