R/R problem - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
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post #1 of 16 (permalink) Old 02-07-2012, 05:06 PM Thread Starter
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R/R problem

Hi all! As I posted a few days ago, I had trouble with my carbs. Took 'em off and worked on them and they were finally good to go, but when I put them in, the following happened:

Turned the key to ON, everything powered up as it should, pressed the start button and it acted like the starter was stuck. This happened before and it was a short in the wiring.

Tried it again and once more and it fired up finally. After having it idle a little while I turned it off to see if it would start back up and it did. Did it once more to be sure and then I left it idling a little while to check if the RPMs wouldn't go down as they did before.

RPMs were steady and it revved up great.

After a little while though I started seeing smoke coming out from the left panel, where the fuses go. I shut the bike off immediately and then took off the panel.

Smoke was from the cables that go to the regulator. The regulator itself was quite hot and the cables had melted.

So here's what I'd like to ask you. Is this common when a regulator goes out? Does this seem more like a short elsewhere on the wiring diagram that caused this behavior?

Trying to find out cause I don't want to plug in another R/R just to fry it too.

Also, I could search this up in the verses, but since you're already here... How do I know for sure if the regulator is fried or if it's still working right?

I definitely got my eye on the mosfet R/R now.

1985 VN700 unknown mileage (over 33K)

AGM Battery
Iridium spark plugs
NGK wires and caps
Relocated R/R
Marbled
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post #2 of 16 (permalink) Old 02-07-2012, 07:55 PM
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Mine went without smoking..... What wires melted? That may help diagnose the problem. You could check the pins of the R/R for a short to each other, and check the wires in the connector for shorts.
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post #3 of 16 (permalink) Old 02-08-2012, 12:18 AM Thread Starter
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Well, the thing is that... while I moved the regulator out from the goat's belly's heat, I was careless and the cables themselves were on the goat's belly.

I'm thinking MAYBE the goat's belly heated them until they melted and then there was a short between them.

Or maybe the short was originated for completely unrelated reasons... what I do know is that I hate electrical problems u_u

Especially since I don't have a multimeter! My friend is probably getting tired of me asking him to lend me his lol.

1985 VN700 unknown mileage (over 33K)

AGM Battery
Iridium spark plugs
NGK wires and caps
Relocated R/R
Marbled
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post #4 of 16 (permalink) Old 02-08-2012, 08:51 AM
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Oh, that's bad if your wires were resting on the goats belly. You can test the R&R with the instructions in the manual. If your lucky your R&R is still good & it just shorted out a wire which is an easy fix.

Good Luck!
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post #5 of 16 (permalink) Old 02-08-2012, 04:27 PM
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Do you know what wires were shorted? The yellow wires go to your stator if it was one of those I would do a continuity check of the stator.
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post #6 of 16 (permalink) Old 02-08-2012, 06:25 PM Thread Starter
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Not sure which wires got fried cause there was black tape on that part of the wires and it became one ball of gunk lol. I couldn't separate the wires from the melted tape, so I just cut them where there was no tape.

I'll be sure to check everything that has been suggested here. Probably Friday or Saturday though... my friend was kind enough to offer his Ninja 250 if I need it to go to work I might just borrow it even if I don't just to test it out and see what that type of bike feels like to me.

1985 VN700 unknown mileage (over 33K)

AGM Battery
Iridium spark plugs
NGK wires and caps
Relocated R/R
Marbled
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post #7 of 16 (permalink) Old 02-12-2012, 07:14 PM Thread Starter
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I swapped in another R/R and it heated up just like the old one.

What could make the R/R heat up?

1985 VN700 unknown mileage (over 33K)

AGM Battery
Iridium spark plugs
NGK wires and caps
Relocated R/R
Marbled
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post #8 of 16 (permalink) Old 02-12-2012, 07:22 PM
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I've heard they get hot enough to burn your hand when operating normally. But I haven't confirmed that myself. I prefer branding myself by working on the bike with the exhaust still hot!

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #9 of 16 (permalink) Old 02-12-2012, 07:25 PM Thread Starter
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But the wires themselves are getting hot as well... I'm just not sure if they'll melt again if I keep the bike running like that.

They weren't melting hot yet, but I only ran it for a couple minutes.

1985 VN700 unknown mileage (over 33K)

AGM Battery
Iridium spark plugs
NGK wires and caps
Relocated R/R
Marbled
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post #10 of 16 (permalink) Old 02-12-2012, 07:34 PM
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If the wires are getting that hot, I agree something's not right.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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