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Old 11-12-2013, 04:25 PM   #1
inte OP
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Bizarre 950 symptom…?

2005.5 950S, ~60k miles, recently rebuilt H2O pump.

After sitting for a few weeks went for a spin & heard a periodic "whine" when the bike was parked. Heard it might be the sound of the radiator sucking on an empty coolant reservoir. Filled the reservoir to the brim, & a few weeks later went for another spin…

Parked, and now the bike has a funny smell and makes a very high-pitched, constant whine (audio file attached).

What would cause a sound like this?

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Old 11-12-2013, 04:36 PM   #2
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Boy that is weird! Check your battery. It could be that your voltage regulator is overcharging and your battery is hot and gassing.
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Old 11-12-2013, 04:45 PM   #3
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What do youy mean parked?

Engine on, engine off? Lights on? Sounds like HID headlights to me. Or maybe the battery boiling?
Shooting in the dark.
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Old 11-12-2013, 04:59 PM   #4
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Stock electrical system (Euro KTM headlight + switch & heated grips are only additions made years ago), bike parked, engine off, key out… just sitting there, whining.

Battery about to explode makes sense… have heard that sound before & this seems to be the same. Strange as this has never happened in the past & the bike is always kept on a tender.
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Old 11-12-2013, 05:15 PM   #5
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Did you do the proper bleed on the system after doing the pump?
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Old 11-12-2013, 05:18 PM   #6
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Originally Posted by Two Moto Kiwis View Post
Did you do the proper bleed on the system after doing the pump?
Yep.

Plus this symptom didn't crop up until a 4-5k miles after the rebuild.
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Old 11-12-2013, 05:21 PM   #7
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Yep.

Plus this symptom didn't crop up until a 4-5k miles after the rebuild.
Cool, Ok, check voltage to see if it is going overboard, maybe voltage reg going on holiday and sending your battery with it.

Have you checked to see if the battery is stinkin hot or do you get that god awful boiling acid smell ?
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Old 11-12-2013, 05:37 PM   #8
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Cool, Ok, check voltage to see if it is going overboard, maybe voltage reg going on holiday and sending your battery with it.

Have you checked to see if the battery is stinkin hot or do you get that god awful boiling acid smell ?
Smell… definitely. Just pulled battery after bike had been sitting for at least an hour or so… brutally hot. Hotter than the engine cases even after sitting that long.

So… voltage regulator is the best place to start? Other possibilities?
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Old 11-12-2013, 07:29 PM   #9
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99% Voltage reg, see if you can test it or get it tested, your battery may be an anchor now unfortunately... but you may have got away with it ... unlikely tho.

Certainly check all wires, connections etc as a bad earth can do nasty things however all the signs point to the voltage regulator packing a sad and unfortunately probably taken your battery with it.
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Old 11-13-2013, 12:04 AM   #10
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My SE did the same thing...same sound. Replaced the battery and all was right in the world again. My VR was ok.
Remove the battery and connect your leads to another good battery via jumper cables(car batt works fine) . Stare'r up and check the charge voltage.
If it's 13-14.5 the VR is good to go .

Install a new batt

I really think that most of the VR problems are due to the batteries failing in these bikes ..
If you are able to catch the problem soon enough (before the VR "full fields" and burns out), all that is needed is a new battery.
I rode to work one morning (20K), when I pulled in to park and turned off the bike I heard the same sound. I removed the seat and the batt was SMOk'N HOT also.
I removed it and tested my charging system as stated above. That was 2 years ago and it still works great with the new batt.
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Old 11-13-2013, 03:18 AM   #11
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Boy that is weird! Check your battery. It could be that your voltage regulator is overcharging and your battery is hot and gassing.
Thanks for posting the sound of a gassing battery! I was thinking it HAD to be chemical as it's the only on-board energy scource that could go on for so long.

Good luck finding the culprit.
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Old 11-13-2013, 04:24 AM   #12
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Boy that is weird! Check your battery. It could be that your voltage regulator is overcharging and your battery is hot and gassing.
+1 That is What my bike did. Had to replace the reg, battery.
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Old 11-13-2013, 06:34 AM   #13
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+2 on the overcharging battery causing the smell and the noise. First time it happened on mine, I replaced the battery and it was fine for about 3 months. Then it did it to me again (left me stranded both times) and I replaced the voltage regulator and the battery. That was 6 years and 35,000 miles ago. Fine ever since.
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Old 11-13-2013, 12:55 PM   #14
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Quote:
Originally Posted by JOKER650 View Post
My SE did the same thing...same sound. Replaced the battery and all was right in the world again. My VR was ok.
Remove the battery and connect your leads to another good battery via jumper cables(car batt works fine) . Stare'r up and check the charge voltage.
If it's 13-14.5 the VR is good to go .

Install a new batt

I really think that most of the VR problems are due to the batteries failing in these bikes ..
If you are able to catch the problem soon enough (before the VR "full fields" and burns out), all that is needed is a new battery.
I rode to work one morning (20K), when I pulled in to park and turned off the bike I heard the same sound. I removed the seat and the batt was SMOk'N HOT also.
I removed it and tested my charging system as stated above. That was 2 years ago and it still works great with the new batt.
All good to know. I like the way you looked at the problem and came up with a 180, looking at the battery first!

Sorry, I don't mean to hijack your thread, but does anyone know the answers to these..

Say I'm in the field, and I notice on my volt meter (which I don't have fitted yet but I want one) that the volts are high at say 15 or above. I stop and kill the motor. I check my battery volts and it's around 12 so the battery isn't cooked. I load-shed by unplugging lights etc. Can I just unplug the VR and ride till my 12v battery gives up or would that kill the stator running unloaded?

Or... say the battery gets cooked with the volts reading 13 ish, so it's a battery fault not a VR. Can I just get it running and disconnect the battery? That should have the VR controlling the normal output volts and running everything, right? Would this get you going or kill the stator/VR?

I can easilly carry a spare VR, but a battery...
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