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Strange fluctuating voltage readings

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So it does look to be conducted transients, the tinfoil did not change things and the meter appears to be working fine. Testing the stator shows it's fine. Not sure where this is coming from, I could pull out the relay for the coils and wire everything back up but really don't want to do that as I've spent enough time on this. Main think I'm trying to figure out now is, will these conducted transients harm the bike in anyway?
 
azr said:
Leg to ground results were 0 at 5000rpm, so everything with the stator appears to be fine. So the battery that came with the bike will now not charge, I put in a battery from my bike and all the numbers are looking good with the exception of these voltage drops. I'm guessing even though the PO bought a new battery, he and the new owner drove around with a blown stator and reg/rec, therefore overcharged the battery and that is why it won't show charging numbers (although as of an hour ago it did show charging numbers, although they were going a bit higher than 15V at 5000rpm, about 15.4). Is this erratic voltage dropping going to be a problem or should I just leave it alone?
Click to expand...

15.4V is about 1.0V tooo high; That is over charging

I posted on this sometime back, just because you can not find a test that the stator does NOT pass, that does not mean that it is good!! Only if it fails do you know it is bad. It is still possible that you are having break down in the stator and it is effecting the R/R causing it to loose it's reference climbing up to 15.4V (that is a guess but it makes sense that they might be related)
 
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I put in a different battery and now have 14.8V. Still have the fluctuating drops in voltage though, just not as often, or as low of a drop.
 
"...will these conducted transients harm the bike in anyway?"

Bike will tolerate them better than you! "Conducted transients" ? Must be time for a beer
 
I have a spare stator kicking around that will fit if you want to try something else...
 
Ok, I'm going with 'no, they will not harm the bike' and am going to have a beer. Jim....I ummmm....looked at that document for about 3 seconds and them quickly closed it as my head started to hurt..
 
azr said:
Ok, I'm going with 'no, they will not harm the bike' and am going to have a beer. Jim....I ummmm....looked at that document for about 3 seconds and them quickly closed it as my head started to hurt..
Click to expand...

Too bad you do not have a scope, you could probably use it to see the spikes and potentially use it as an early warning of stator failure.
 
azr said:
Ok, I'm going with 'no, they will not harm the bike' and am going to have a beer. Jim....I ummmm....looked at that document for about 3 seconds and them quickly closed it as my head started to hurt..
Click to expand...

You have more endurance than I....
 
Here's my backup early warning device for stator failure - the screwdriver is pointing at LED which won't light unless voltage at battery is over about 13.5 volts.
 

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Nice idea, but if a light is warranted, I would rather have a "warning" light than an "it's OK" light.

I still prefer gauges, though, either analog or digital, depending on what I am monitoring.

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Of course I have a onboard voltage meter on bars, but all these things are made on China so I have little faith though it has lasted 4 years. A Warning light won't "warn" if it's wiring has become somehow disconnected. If my light goes out, i can investigate.
 
Steve said:
Nice idea, but if a light is warranted, I would rather have a "warning" light than an "it's OK" light.

I still prefer gauges, though, either analog or digital, depending on what I am monitoring.

.
Click to expand...

I have a VDO 45 degree sweep volt meter to match a 270 degree sweep oil pressure gauge. However the analog Volts gauge doesn't really have the same resolution as a cheap digital model for sensing the subtleties of the charging system. Ebay abounds with cheap LED Volt meters which from my experience are pretty accurate; certainly better than analog.
 
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