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Discussion Starter #1
I'm really inexperienced at this stuff, particularly in regard to electrical/ignition issues. I'm desperate for help.

Initially I was riding my 92 R100GS about 10 miles, when the bike just died as I was riding it. When I tried to re-start it, the engine turned over, but it wouldn't fire up. It turned out that the there was no spark at the plugs.

In trying to troubleshoot why the plugs were not sparking, I made a very stupid and rash decision. The plugs in the bike are Bosch Super RO 668's. This morning, suspecting that something might have been wrong with it, I removed the right cylinder plug and replaced it with an older one, a Bosch RO 948. I left the 668 in the left cylinder and fired the bike up. It turned … and then I lost all power a second later, and still don't have any.

Now when the key is turned on and the kill switch is also on, I get an intermittent electric buzzing sound from one of the relays. But with the kill switch off, no buzzing.

My question: Can anyone please tell me what I might have screwed up by doing this? How I might be able to restore power?

Please help.

Thank you.
 

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Discussion Starter #2
Also...

I replaced the one of the two black relays that was making the buzzing sound.

Still no power.


And, after fu..ing up by turning the bike over with two different plugs which preceded the power failure, I put in two brand new plugs (matching, of course).

No power.


And, the battery voltage is 13 volts, but there is NO voltage at the coils (some actually, but in millivolts).


By the way, the ignition coil is brand spanking new. Also, when I initially only had the problem of no spark at the plugs, I WAS getting voltage to the coils. Now, after fu..ing up by using two different plugs, there is NO voltage to the coils.:mad:
 
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