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I'm hoping someone can help me with this. I've got an SG that stopped sparking quite a while ago, and while it's been down, I've fixed several mechanical issues, but have been putting off the electrical, because I don't know much about it.
Anyway, the bike cranks and all of the lighting works, but it just won't fire the plugs. I checked the pick up coil, and found a severed wire and repaired it, and the resistance was reading perfect until I moved it. I've heard that multiple break in these wires are common, so I checked a replacement assembly from a parts bike, and it measued perfect, and even wiggling and tugging on the wires didn't disrupt the reading. I replaced the pickups with the ones from the parts bike, and they're reading good. I set the pick up clearances at .028" (.71 mm), hit the starter button, and... nothing.
I also checked the ignition coils. Primary lines read perfect, but the reading through the caps was tricky to get a reading to show up, so I actually pulled the caps off and measured, and I got a reading right around 15K ohms on all of the leads without caps. I was getting a resistance reading through the caps themselves, but I can't recall what they read off the top of my head, and I'm not near my bike right now. Anyway, after that, I guessed that that seemed normal, so I suspected the dreaded black box failure. Luckily, my brother has as SH and I put my black box on his and his bike fired right up. I also put my spark plugs in his bike, and they worked too. I'm not really sure what else the trouble could be. Anyone that can provide a little direction toward what else could potentially cause the loss of spark would be my hero. I wish that I understood electrical systems, but I'm brand new to electrical, and could really use a lot of help.
Thanks in advance.
Anyway, the bike cranks and all of the lighting works, but it just won't fire the plugs. I checked the pick up coil, and found a severed wire and repaired it, and the resistance was reading perfect until I moved it. I've heard that multiple break in these wires are common, so I checked a replacement assembly from a parts bike, and it measued perfect, and even wiggling and tugging on the wires didn't disrupt the reading. I replaced the pickups with the ones from the parts bike, and they're reading good. I set the pick up clearances at .028" (.71 mm), hit the starter button, and... nothing.
I also checked the ignition coils. Primary lines read perfect, but the reading through the caps was tricky to get a reading to show up, so I actually pulled the caps off and measured, and I got a reading right around 15K ohms on all of the leads without caps. I was getting a resistance reading through the caps themselves, but I can't recall what they read off the top of my head, and I'm not near my bike right now. Anyway, after that, I guessed that that seemed normal, so I suspected the dreaded black box failure. Luckily, my brother has as SH and I put my black box on his and his bike fired right up. I also put my spark plugs in his bike, and they worked too. I'm not really sure what else the trouble could be. Anyone that can provide a little direction toward what else could potentially cause the loss of spark would be my hero. I wish that I understood electrical systems, but I'm brand new to electrical, and could really use a lot of help.
Thanks in advance.
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