Replace R/R again? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 12 (permalink) Old 04-03-2007, 09:18 AM Thread Starter
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Question Replace R/R again?

Since I am doing a stator relacement. I was wondering. I replaced the R/R and had been running around on short rides charging the batt after rides. I've noticed the connectors on the R/R have shown some heat. Looks like it's across one of the Stator wires and ground. Should I replace the R/R again before starting her up? What are the odds I fry the new stator?

Thoughts, Ideas.

"Angel"
1990 VN750
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"Priscilla" aka "The other woman"
1985 VN700
(Purchased from DMAG)
Rebuilding for the road.

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post #2 of 12 (permalink) Old 04-03-2007, 10:23 AM
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I wouldn't risk it for $100. Since you see some evidence of heat, I'd also trace the wires from the rr to the stator and make sure they're allright.

I replaced the stator and r/r on my Suzuki GS550L (even more notorious than the vulcans for frying stators) and did a rushed job (missed a short farther up the line), within a couple months I was back to very little charging system.

I'd trace all the wires between the stator and r/r too - make sure they are in good shape.

Take your time, do it right - especially since you have to pull the motor to get to this stator.

Curtis - Albany Oregon.
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post #3 of 12 (permalink) Old 04-03-2007, 10:40 AM Thread Starter
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Yeah I checked the wires all the way from the stator to the R/R. They are good. I don't want to have to replace the stator again this year. I guess I just have another delay in riding.

"Angel"
1990 VN750
Loads of extras
On the road.

"Priscilla" aka "The other woman"
1985 VN700
(Purchased from DMAG)
Rebuilding for the road.

Buy it to ride it!
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post #4 of 12 (permalink) Old 04-03-2007, 01:01 PM
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Quote:
Originally Posted by Foxhound View Post
Yeah I checked the wires all the way from the stator to the R/R. They are good. I don't want to have to replace the stator again this year. I guess I just have another delay in riding.
I bought a spare r/r for Orleans off of eBay, but it turns out she didn't need it. If you want to buy new, I'd totally understand - but thought I'd let you know there's one here up the road (I think I paid $25 + shipping).

C
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post #5 of 12 (permalink) Old 04-03-2007, 01:15 PM
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I just called rick's and they are sold out of R/Rs till the end of the month-- so if you decide against it Fox, id be interested in buying yours C-

-josh
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post #6 of 12 (permalink) Old 04-03-2007, 01:39 PM
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I just called rick's and they are sold out of R/Rs till the end of the month-- so if you decide against it Fox, id be interested in buying yours C-

-josh
You guys might also check eBay - I think I saw one posted in the last 24 hours or so. But, whoever, just keep me posted!

C
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post #7 of 12 (permalink) Old 04-03-2007, 02:52 PM Thread Starter
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Thanks for the offer Cindy. I would have taken you up on the offer but I already ordered on from Bike Bandit. I got the electrex not the oem. 89 + shipping. Not too bad and I guess its worth the piece of mind knowing it wont fry my new stator.

"Angel"
1990 VN750
Loads of extras
On the road.

"Priscilla" aka "The other woman"
1985 VN700
(Purchased from DMAG)
Rebuilding for the road.

Buy it to ride it!
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post #8 of 12 (permalink) Old 04-03-2007, 03:00 PM
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Thanks for the offer Cindy. I would have taken you up on the offer but I already ordered on from Bike Bandit. I got the electrex not the oem. 89 + shipping. Not too bad and I guess its worth the piece of mind knowing it wont fry my new stator.
That's not bad at all. But ya know, you're gonna enjoy tinkering sooooo much, that at some point you'll wish your r/r would blow your stator, just so you can do another engine pull. :-)

I still don't understand how I blew my regulator last summer, and not my stator, too. In theory, wouldn't the stator just continue to generate AC output until it cooked itself as well? Anyway, it's fine, and I'm feeling very lucky 'bout that.

C
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post #9 of 12 (permalink) Old 04-03-2007, 03:06 PM Thread Starter
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That's not bad at all. But ya know, you're gonna enjoy tinkering sooooo much, that at some point you'll wish your r/r would blow your stator, just so you can do another engine pull. :-)

I still don't understand how I blew my regulator last summer, and not my stator, too. In theory, wouldn't the stator just continue to generate AC output until it cooked itself as well? Anyway, it's fine, and I'm feeling very lucky 'bout that.
I'm pretty sure it depends on what part of the R/R circuit fries. Also I'm not totally sure weather a short or open stator wont fry the R/R again. Thats my worry. If I only change one and not the other I could end up in an endless cycle. I've tried checking both my stators and my R/Rs with a multi meter and the clymer manuals specs but they never made sense. Even with my electronic background.

"Angel"
1990 VN750
Loads of extras
On the road.

"Priscilla" aka "The other woman"
1985 VN700
(Purchased from DMAG)
Rebuilding for the road.

Buy it to ride it!
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post #10 of 12 (permalink) Old 04-03-2007, 03:14 PM
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Quote:
Originally Posted by Foxhound View Post
I'm pretty sure it depends on what part of the R/R circuit fries. Also I'm not totally sure weather a short or open stator wont fry the R/R again. Thats my worry. If I only change one and not the other I could end up in an endless cycle. I've tried checking both my stators and my R/Rs with a multi meter and the clymer manuals specs but they never made sense. Even with my electronic background.
Not to display what the Germans call "Schadenfreude," but I'm so glad to hear that you can't make sense of your stator and r/r readings, either. I can actually take the readings with an analog multimeter, but not digitally - and I can't for the life of me figure out why. I think there are other ways to test the system (more than just readings ohms), but I haven't tried those yet.

Let's see: the main thing that will blow in the r/r would be the diodes, wouldn't it? Battery's discharging, diodes are working to rectify AC to DC so they're heating up just by working. However, it's hot out, you've got a crummy maintenance-required battery, you're sitting at 1100 rpms, and so your battery is discharging even more rapidly than normal. So the diodes in the r/r are working harder to convert AC, therefore getting hotter, therefore eventually blowing themselves to a pile of molten diode-ness. Someone here told me last year that while a bad regulator will ruin a stator, the reverse is not true. But I need to read some more to understand why that's the case.

C
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