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The Vintage Japanese Motorcycle Owners Group: Discussion Forums

Vintage Japanese Motorcycle Owners Group :: View topic - Ts185 spark issue


Ts185 spark issue

 
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zmurr94
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PostPosted: Tue Jun 20, 2017 1:24 pm    Post subject: Ts185 spark issue Reply with quote

1976 ts185 cdi ignition
Took a video of my problem. Thanks for your help
Zach

https://youtu.be/piYDl92Kup8
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05c50
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PostPosted: Tue Jun 20, 2017 7:49 pm    Post subject: Reply with quote

Does your bike have a kill switch? If it does, will the spark plug spark when it's turned off, the same as when the ignition switch is turned?

.......Paul

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zmurr94
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PostPosted: Wed Jun 21, 2017 1:54 am    Post subject: Reply with quote

I un hooked the kill switch. Is there any tests I can do for the cdi unit?
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spurlock
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PostPosted: Wed Jun 21, 2017 7:48 am    Post subject: Reply with quote

zmurr94 wrote:
I un hooked the kill switch. Is there any tests I can do for the cdi unit?


I'm not at all familiar with the ignition system on that bike, but here are a couple of thoughts. All repair manuals I've seen on CDI ignition bikes say the only test is to replace the CDI with a known good unit. But if your tachometer runs off of the CDI pulses rather than a mechanical cable, another test is that the tach needle should move slightly when cranking. If it does not, there is no output from the CDI.

Another thing to test is the pulse generator coil with an ohmmeter. A manual should have a spec on that, probably on the order of a few hundred ohms. Again, I don't have a wiring diagram for your bike but it seems like maybe your ignition switch works by grounding one of the CDI leads when switched off. Since that generates a spark, that might indicate a bad ground from the pulse coil or other bad connection somewhere in the ignition wiring. Just a wild guess.

-Bill

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05c50
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PostPosted: Wed Jun 21, 2017 11:10 am    Post subject: Reply with quote

I don't have a manual for your bike either, but what Bill said about checking the pulse coil is what I was thinking. Since turning the key causes the coil to spark, that indicates that the signal from the CDI to the coil is OK. If I remember correctly, the wire from the CDI to the ignition switch and one of the wires from the CDI to the pulse coil are the same color (black and white, I think). I would check that circuit very closely. I'm probably wrong, but you got to start somewhere. Wink

.....Paul

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dorT500
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PostPosted: Wed Jun 21, 2017 11:51 am    Post subject: Reply with quote

This help?

http://www.classiccycles.org/media//DIR_1653304/DIR_1762756/bdc7491bb0a214d7ffff82b0ffffe41e.pdf

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05c50
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PostPosted: Wed Jun 21, 2017 1:38 pm    Post subject: Reply with quote

dorT500 wrote:
This help?

http://www.classiccycles.org/media//DIR_1653304/DIR_1762756/bdc7491bb0a214d7ffff82b0ffffe41e.pdf


I saw that diagram, but I don't think it has accurate wire colors, but it does show the wires from the pulse coil and ignition switch are the same color.

.........Paul

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zmurr94
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PostPosted: Sun Jun 25, 2017 6:20 pm    Post subject: Reply with quote

Pulled all electric connections and dielectric greased. Seemed it fixed my problem. Starts in 1 kick now. 👍🏼
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05c50
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PostPosted: Mon Jun 26, 2017 11:02 am    Post subject: Reply with quote

Great! Thanks for the update, maybe it will help someone in the future.

.......Paul

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