Mystery kill switch?????? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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Where does this wire go?
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post #1 of 9 (permalink) Old 03-26-2009, 12:26 PM Thread Starter
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Mystery kill switch??????

Every once in a while my '99 dies as if the kill switch was used. Seems to happen most when I'm stopped and turned right. I figured bare wire so I pulled the headlight bucket and pulled the key and ignition out.

Here's the goofy part: I will start the bike and then wiggle different wires coming from the ignition with no problems. But when I twist the whole tumbler and all it kills the motor. It doen't stall or sputter it just flat dies. Then sometimes before it will engage the starter again I have to turn the key from the left to "on" then to the right then back to on.
Never blown any fuses and have cut the wrap off the 7 wires coming from the switch down past where they go around the neck and don't see any damaged wires.

I guess what I need to know is can I somehow "disable" the kickstand and right grip kill switches; i.e cut or run voltage to the wires to see where the problem is?

Or is there anything inside the ignition (tumbler) that could be checked?
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post #2 of 9 (permalink) Old 03-26-2009, 12:52 PM
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I would say it is your ignition switch. The contacts get bad, or just worn out. Check the forum there are some pictures there of other people pulling the switch apart, to see if it is repairable. If okey,then maybe the kick stand switch can also be bad. You can jump the wires to see if that helps.

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post #3 of 9 (permalink) Old 03-26-2009, 01:22 PM
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If all your wiring appears sound, but twisting the whole tumbler kills the engine, perhaps it is loose or dirty contacts in the switch, under the tumbler. Check out page 1 of maintenance pics in the gallery, and you will find Ignition switch photos #1-4. Other members have posted regarding ignition switch problems being solved by dismantelling, using contact cleaner and bending the contact slightly more open with a small screwdriver. There is a detailed write up for this that was referenced in a post a week or so ago. I`ll see if I can find it again. If you do try dismantelling the switch, do it over a cloth on the bench to catch any dropped springs or small steel balls.

The tumber is a separate piece from the electrical switch proper. The tumbler has a small rectangular projection on the bottom, similar to a slotted screwdriver tip, that engages a slot in a disc in the switch. Good luck with finding the gremlin.

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post #4 of 9 (permalink) Old 03-26-2009, 02:18 PM
 
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Took my switch apart and cleaned it. resoldered a couple of wires and replaced one of them as it was looking tight when i was turning the headstock. I also replaced the springs with new ones inside to make better contact...
Good link here to replace your switch altogether or hotwire to help trace the problem. If my switch goes again this is what i will do... https://www.vn750.com/forum/archive/i...hp/t-2433.html
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post #5 of 9 (permalink) Old 03-26-2009, 02:53 PM
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I wanted to tell you it was a Vulcan Secret, but it's too late for that now. So here is another thread, about the same problem.

It's not at all un-common.
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post #6 of 9 (permalink) Old 03-26-2009, 03:15 PM
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It might be worth checking the wires from the switch closer. If memory serves me right they run through a plastic sheath and they can get broken/worn inside of it without any outside indication. The fact that it dies when turning right tells me that's where you'll find the culprit.

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post #7 of 9 (permalink) Old 03-26-2009, 03:24 PM
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Repair or replace the ignition switch.


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post #8 of 9 (permalink) Old 03-28-2009, 01:42 PM Thread Starter
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Update: I took apart the ignition switch and cleaned the contacts and it totally solved the problem. There is no mystery you medling kids can't solve!

Thanks for all the help!
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post #9 of 9 (permalink) Old 03-30-2009, 02:24 PM
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So where's the Scooby Snacks?

87 vn750at least that is what the frame #'s say
"Squirrel Bike" aka Jersey

Rat bike with a good PR agent

shaved and coastered
2 into 1 exhaust
rear 170 and front 110
Relocated R/R
custom dash with voltmeter
Spitfire windscreen
Plutonium plugs
Recovered seat without "butt hammers"
More to come
Praise to the Parts Goddess Crobins for needed things

When someone tells me "Great minds think alike" all I can think is "You Pervert"
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