Bike died at Intersection - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

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post #1 of 15 (permalink) Old 05-22-2014, 11:38 AM Thread Starter
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Bike died at Intersection

So last night I was riding home and I started to have some issues. About half way home (about 10 miles on the bike) the engine started to stutter causing random RPM spikes, from about 4k to 6k, and a really rough ride, at the same time the lights on the bike would all dim. If I revved the engine up a bit higher, it would seem to clear up for a minute before starting up again, or if i shifted to a higher gear it seemed to give me a few minutes of problem free cruising. As I was about 5 minutes from home I started braking as i came to an intersection all the power on the bike just completely cut out and the bike died.

I've already checked the battery and it has come up fine so I'm really looking for where else I should start looking to figure this out.
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post #2 of 15 (permalink) Old 05-22-2014, 11:44 AM
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Check your grounds, your stator and R/R and.....your ignition switch.

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post #3 of 15 (permalink) Old 05-22-2014, 12:20 PM
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Sounds like a dead battery and not charging, but could be a short or bad switch.

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post #4 of 15 (permalink) Old 05-22-2014, 12:21 PM
..have a vulcan good day!
 
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Quote:
Originally Posted by Knifemaker View Post
Check your grounds, your stator and R/R and.....your ignition switch.
x2

If all above seems ok, next look into possible POOGS.

hth


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #5 of 15 (permalink) Old 05-22-2014, 01:16 PM
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Its the switch i bet. Open and clean the ignition switch puck under the key. No need to take it all the way off. You will have enough room to sand lightly the copper and slightly stretch thecsprings. Three if i remember. Careful as the springscand ball bearing can get away from you. Then if you break the plastic clips lije i did, a little superglue and a tie wrap the really cinch it up under the key works great.

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post #6 of 15 (permalink) Old 05-22-2014, 02:09 PM
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I've had a loose ground cause the exact same issues. Simple stuff first!

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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post #7 of 15 (permalink) Old 05-22-2014, 04:45 PM
..have a vulcan good day!
 
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Simple stuff first!

x2


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #8 of 15 (permalink) Old 05-23-2014, 07:10 PM Thread Starter
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So looks like my multimeter had gone belly-up... I went to use it for some work on my computer and noticed that it seemed to be reading everything incorrectly, specifically it was reading 10-15% high. Borrowed a different one from a neighbor and it looks like I need to start at a new battery, only got 11.2v on it with a confirmed working meter as opposed to the 12.4 my old meter gave me.

Looks like I need to start there and then see if I actually have any other issues.
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post #9 of 15 (permalink) Old 05-25-2014, 10:25 PM Thread Starter
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Unhappy

I had a little bit of time to take a closer look at the bike today and I found at least a couple issues, the ground had broken and the terminal connecting to the negative pole of the battery had come loose and wasn't getting a good connection. I fixed the break in the ground, soldered the wires back together and used some heat shrink to seal it, and I have a terminal back on the wire to the battery. I am borrowing a battery from a co-worker at the moment to test any work that I do. Beyond that I also took the time to clean the ignition switch today.

At this point I get electricity when I turn the key but when I try to start the bike It cuts out...If I turn the key off and on again I get power again.

I haven't had the time to dig into the bike any more yet (regulator/stator) because of work and I likely won't have a chance to do much more than I have until next weekend because of work and some classes that I am currently taking but I was wondering if I should keep looking in the same direction at this point or if I should start looking to the starter.

By the way, thanks for the point about checking the ground, probably wouldn't have thought about it until I had the bike completely torn apart if it wasn't said.
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post #10 of 15 (permalink) Old 05-25-2014, 11:07 PM
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Check also your connection at the 6 pin connector between the rectifier and the wiring harness.

Also, take off the left side neck area cover (between the front of the gas tank and the handlebars) and check all of those plugs - I found the brown plug corroded, and cleaned it up.

This, in addition to cutting the rectifier connector and individually spade connecting each of the six wires, helped me with almost the same issue you are having.

Take note - is your tachometer dropping rapidly (instantly) to zero when it dies? Does it blip up and down a bit when it's stuttering? That's the problem I had.... Still working on it too.
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