Trying to diagnose the charging issue. Here is my stator. The melty parts on the coils, especially the one near the top seem like a good indication this is bad. There were a couple wires on the back that looked like they were maybe a bit crispy, but it was in a small, very isolated area.
Why don't you take your stator to a shop that can test it?
Never mind. Did tests and consulted someone who understands electrical systems better than me. It's bad.
Beer Baron wrote: ...The melty parts on the coils... ...There were a couple wires on the back that looked like they were maybe a bit crispy...
Duh. 1 "crispy" spot or 1 melty part == BAD with stators.
Is this a common Street Triple problem?
turtl631 wrote: Is this a common Street Triple problem?
Apparently. The original regulators were crap. There was a recall on them. Mine had the recall work done but it looks like one of the coils was already fried and eventually took the othet two with it.
Once the regulator has been upgraded and the stator replaced I gather the issue is sorted.
Why do you ask?
New stator installed. Bike runs. Just over 13.1 volts at idle; 14.1 volts at 6,000rpm. Problem appears to be solved and the regulator still healthy.
Whenever a stator goes, I always put a new regulator in and suggest that to others. Of course, I'm talking Harleys here, but the principal is the same. Something killed the last stator. Unless a stator replacement is cheap and easy, I'd replace that regulator as well.
Old stator was replaced under recall in December. My theory is that killed one coil which slowly damaged the other two.
A burned up coil would short to ground and keep generating heat which would eventually melt the others.
Burned up coils can short to each other or themselves, as well as ground.
Something causes then to heat up and burn out, they don't simply do that on their own.
Beer Baron wrote: Old stator was replaced under recall in December. My theory is that killed one coil which slowly damaged the other two. A burned up coil would short to ground and keep generating heat which would eventually melt the others.
You mean the old Regulaor rectifier was replaced under recall.
Yes that failure could have damaged the Stator
If the regulator was replaced under recall, then the stator should have been properly checked at that time and replaced as well (under recall) if it was bad.
Dr. Hess wrote: If the regulator was replaced under recall, then the stator should have been properly checked at that time and replaced as well (under recall) if it was bad.
You would think. When I called the dealer that replaced it, they didn't say anything about the stator. I didn't think to ask specifically if they checked it or not.
The voltmeter seems to indicate that it is functioning properly though.
foxtrapper wrote: Burned up coils can short to each other or themselves, as well as ground. Something causes then to heat up and burn out, they don't simply do that on their own.
Right. And the old r/r likely caused one coil to burn up and short. That one could easily have generated enough heat to take out the other two. The battery is charging, and the regulator appears to be doing its job of capping power at 4.15v. I suppose it might be an interesting test to ride for an hour, come back, and see what kinds of voltage it is giving then.
Keep an eye on the battery's acid level for a bit too. Don't be surpriced if the battery is junk after the winter break or any period of long storage seem they also fail after theres been a problem with the charging system there just not built to be "deep storage" type of battery.
44Dwarf wrote: Keep an eye on the battery's acid level for a bit too. Don't be surpriced if the battery is junk after the winter break or any period of long storage seem they also fail after theres been a problem with the charging system there just not built to be "deep storage" type of battery.
It's a sealed battery. Also, not much of a winter break since this bike previously lived in Santa Cruz.
I will be keeping an eye on it though. I'm sure this debacle has been hard on the battery.
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