UNIQUE Ignition Problem (checked archives) take a challenge?

[DrDoot]

After a ton of searching I happened across a problem very similar to mine. Here it is:

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posted a previous message to this to which I have not received any replies. This following is an update and the current state:
My 86 GS550L would run fine for a 15 minutes or so and then abruptly die. Attempts to restart would fail until the bike cooled for a while. It appeared to be electrical and I tested the ignitor and signal generator (as well as a charging test). Both the ignitor and SG test did not produce the desire result, but I may have done them wrong (don't think so though). A can of freeze revealed that spraying the SG would permit the bike to start, but shortly after it would again fail.
I purchased a salvage replacement for the ignitor and SG. Replacing the ignitor and then test-riding resulted in the same original problem. Replacing the SG corrected the problem. Having taken a local test ride without incident I later took a longer 30 mile ride. No problems. Went home, parked.
Next night, I attempted to start bike... no luck. Pulled the plugs and checked for spark-- no spark... Check all connections, removed plugs and reseated-- no spark... Occasionally I will get a single spark, but then none. Battery is fully charged.
Could the replacement SG have been faulty as well? Could there be another component that would case the SG to fail? I purchased the SG at a shop that stated if it die shortly after installing, they would send another. I will try that route, however, I am concerned that another component could be killing this part.

REPLY: Larry Eichenbaum
As I originally thought, turns out the Signal Generator was the guilty part. Unfortunately, the first replacement part (used) I received failed after thirty miles. This made me think perhaps the ignitor was also partially at fault and resulting in the SG failing. I received a replacement ignitor and SG and replaced both. All worked immediately after and I have added about 300mi without difficulty.
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I'm having the same problem, and have already replaced the igniter once. Now, I tested both igniter's according to the table in the Haynes manual which gives the proper resistance settings between each tab on the igniter, and both igniter's failed with almost exactly the same readings, and with power going to leads that shouldn't, and no power going to most of the leads that should. Would both igniter's fail in the same way, and could it be the signal generator causing the failure of the igniter?

Assuming both igniters are bad and have failed in the same way, where can I get one? No one on ebay has them. I don't believe a Dyna-S system exists for an '85 GS550E. What can I do to get this running again?

 

[Dink]

You mat be not solving the actual problem, I think you have a resistance problem, most likely a/or several corroded or broken wires, if you original ignitor and SG are still working, fit them and resistance test ALL the wiring in the ignition system; including the ignition switch and run switch. Do these test before you start the bike, now start the bike and run it till it cuts, immediately re- run the resistance tests. Compare the results to track it down. after you have that solved, then fit your replacement parts and let us know.

Dink

 

[DrDoot]

Bike has stopped starting at all. Like the post above, I might be able to get a single spark, but it won't catch and won't start. The resistance while testing JUST the igniter(both of them, off of the bike) reads as a failed component in the Haynes manual. But they both fail in the exact same way.

?

 

[Dink]

Which means the same "other" problem has killed both of them, trace and test your wiring harness, particular attention to EVERY connector on the bike.

Dink