Rear cilynder not firing - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
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post #1 of 22 (permalink) Old 05-04-2014, 02:14 PM Thread Starter
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Rear cilynder not firing

Hi everyone.
I have an 87 did a full rebuild on it all. Replaced most with 04 parts including all electrics.
My rear is not firing. I have narrowed it down to the Igniter. It isn't allowing anything to go to the rear coil.
Does anybody know how I can send power to it for a temporary solve till I can find a new igniter?
Or if anyone has one to sell?
Thanks
Mike
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post #2 of 22 (permalink) Old 05-04-2014, 03:37 PM
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Better check your pick up for the rear.
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post #3 of 22 (permalink) Old 05-04-2014, 03:56 PM
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Quote:
Originally Posted by wmsonta View Post
Better check your pick up for the rear.
I thought the same thing, but was waiting, and somewhat assumed that had been done. That's the first point for a signal to trigger the coil.

I see ignitors on Ebay quite a bit. Prices vary.

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post #4 of 22 (permalink) Old 05-05-2014, 08:02 PM Thread Starter
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Going to sound dumb but
I'm a new rider and don't know jack about a motorcycle. I have checked everything from the coils including swapping them with the front, along with the wires and plugs.
The rear will fire at high RPM's but not at the low.
I don't know what the pickup coil looks like nor do I know where its located at. My book doesn't show a picture.
I do thank you for the response
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post #5 of 22 (permalink) Old 05-05-2014, 10:11 PM
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The pick up could are located behind the stator cover on the left side of the bike. They are small rectangular shaped objects held in place with two screws. Search the forums for pickup coil mod for pictures... Also your book has pictures of them in the electrical chapter under ignition system

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post #6 of 22 (permalink) Old 05-06-2014, 08:27 AM
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So you can see a spark? If you can then I would look toward a clogged jet since it works at higher RPM. Not sure how you can have a spark at higher RPM and not at lower. However, the ignition coil mod is cheap and easy to try as is the pickup coil mod.

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post #7 of 22 (permalink) Old 05-07-2014, 01:02 AM Thread Starter
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@ Goofyfoot 2001
The carbs I jetted them to handle an earshave mod and straight pipes. Jet kit was a custom kit from 6 Sigma. also rebuilt and replaced all parts in carbs.
@ Slimvulcanrider
I will do that tomorrow. Bike is at my cousins house. It's one of those things. I like being on my mountain bike but with shot knees this looked like something I could still enjoy. 42 years old too early to retire but the army did it to me anyways.

This was how I learned to work on cars, just figured a bike would be easier. Thanks guys I really appreciate everything, and all the advice
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post #8 of 22 (permalink) Old 05-07-2014, 08:33 AM
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So if it's a higher rpms then assume there is more current which might suggest a relay. So try the ignition coil mod. It cost about $20 maybe. Shootin in the dark is my middle name! I don't think it's the pickups because they don't move. The rotor (for lack of know the actual term) doesn't expand with centrifugal force, so the gap should not be changing with speed.

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Last edited by Goofyfoot2001; 05-07-2014 at 08:36 AM.
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post #9 of 22 (permalink) Old 05-07-2014, 10:52 AM
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Goofy, there is no ignition relay in stock form... It sounds like a bad ignition control box... Unfortunately there is no bypass to work around the issue...

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post #10 of 22 (permalink) Old 05-07-2014, 05:07 PM Thread Starter
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Slim I was figuring that was it. Just was hoping I missed something.
How bad would I mess up the bike if I went with a hot wire to the red coil lead for a bit? I ran a hot wire to it this morning and its working.
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