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No spark, starter motor cranking

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Hi guys,

My problem started with this:

I went for a quick ride for learning wheelies. The bike was running good for the whole time then I stopped for a little break. After that when I wanted to start the bike it but wouldn't start. The starter motor cranked but nothing happened. After a few tries I noticed that when I pushed the starter button a slight smoke(wich smelled like burnt plastic) came from the bottom of the fuel tank. Ok I tought it is a short so I pushed the bike home instead of trying it more times. Next day I pulled off the fuel tank and checked for burnt cables. I found out that the ground wire which is fixed under the ignition coil burnt down. I replaced it and tried to start the bike. When I started it the replaced wire started to get hot instantly. Ok, I tought it will be something else. I searched for anything else. I found that the ground wire which comes directly from the battery came off from the frame. I screwed back to the frame. After I tried to start again, the ignition coil ground wire didn't got hot that time but it didn't do a single spark.

 

So i tried several thing in the last few weeks. I bought a new ignition coil, hired my friends working CDI and tested with is, bought a new aftermarket stator(Electrex, wich is english made), took apart the whole wiring harness looking for a burnt wire and checked all of the plugs for burning or someting that is not correct. All of these seems to be okay so now I'm clueless what it can be.

The bike is a 2005 E model which is converted into an SM. It has an SM wiring harness with some modifications(side stand switch bypassed, clutch switch bypassed, horn, fan and neutral switch plugs not used).

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You have other, bad grounds. It could be another ring terminal under a bolt, it could be inside the harness where a group of grounds are joined. It could be the main ground at the battery and where it connects to the engine cases.

If you look at the wiring diagram for your bike, it will identify where each ground connects to others as a group and approximately where they attach to the bike. A PITA, but a methodical approach will solve it.

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