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Cylinders 1 and 4 have ignition intermittently.
- loudhvx
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1981 KZ550 D1 gpz.
Kz550 valve train warning.
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- alexnelson
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78 KZ650-D1
K&N pods + 4-1 Pipe
Mikuni VM24 - 7.5/115/#4 Clip
Dyna-S
Dyna 3-Ohm Coils
Vancouver BC
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- loudhvx
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alexnelson wrote: Just had a thought. I once had an issue with another bike where the power to the coils was grounding out on the mounting bracket. This went undiscovered for some time. I went through like 20 fuses in the process of finding it. But it was too late. The coil was burnt out. I took the dyna s from that bike and moved it to the one I'm discussing in this thread. Is it possible I may have damaged the dyna s along with the coil from the previous bike? Can some tell me how I could test for this with a multimeter?
Yes, that is common for Dyna Coil connections to short against the mounting bracket. If the positive side of the coil shorts to ground, then the fuses blow. If the negative side of the coil shorts to ground, and stays shorted, it can damage the coil.
Neither of these by themselves would damage the Dyna S, but if the coil gets damaged to the point where its primary windings short out, then the Dyna S can get damaged.
It is very common for Dyna S ignitions to fail in an intermittent manner.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Please Log in or Create an account to join the conversation.
- alexnelson
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loudhvx wrote: ...but if the coil gets damaged to the point where its primary windings short out, then the Dyna S can get damaged.
It is very common for Dyna S ignitions to fail in an intermittent manner.
Interesting. I certainly say I damaged the primary winding. Its resistance is now at 1.7ohms. I rode it for a while like that too. Would that burn out the DYNA? What's more is my problem is happening on cyl 1 and 4, which is that same coil I burnt out. I don't mean to say I'm using the same coil, just that the magnet on the DYNA that could have been damaged is the 1 and 4 post.
Any way I can bench test this or should I just swap out with another dyna I have kicking around?
78 KZ650-D1
K&N pods + 4-1 Pipe
Mikuni VM24 - 7.5/115/#4 Clip
Dyna-S
Dyna 3-Ohm Coils
Vancouver BC
Please Log in or Create an account to join the conversation.
- loudhvx
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- Posts: 10868
- Thank you received: 1616
A 1.7-ohm coil would likely damage the Dyna S, so I would suspect the Dyna S is the problem.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Please Log in or Create an account to join the conversation.
- alexnelson
- Topic Author
- Offline
- User
78 KZ650-D1
K&N pods + 4-1 Pipe
Mikuni VM24 - 7.5/115/#4 Clip
Dyna-S
Dyna 3-Ohm Coils
Vancouver BC
Please Log in or Create an account to join the conversation.