Rover Eric wrote:
It's not your fuse.
Think of a vespa engine like this : The engine can run completely independent of any and all electrics. The battery and wiring harness are all there to just put juice to the horn and lights.
Now, what i would do to troubleshoot your spark problem :
The CDI is the little blue or black box that hangs off the back of your engine. It takes impulses and charge from the stator, and triggers the spark. There are 4 colored wires running INTO the CDI, and your sparkplug wire running out of it.
Uplug the outermost GREEN wire... the one closest to you and furthest from the engine. This is the contact that runs to all your kill circuits. If this tab gets grounded out, then you will have no spark. Therefore, if your stator is working, and your CDI is good, if you have the red / white / green wires running to your CDI and are not getting spark at the plug, then that's where the problem is isolated : plug, wire, CDI or stator.
If you pull the green wire on the outside and suddenly you have spark, then your green wire there is grounding out somewhere upstream.... this wire runs to your kill circuitry, so either the one on the handlebar or the ignition switch on the column are grounding out when they shouldn't be.
HA...then I have a grounding out problem somewhere. I was able to pull the green wire and still have it start! I also can't get my headlight to work at the moment either
I know now I have a grounding out problem. I suck. Sorry to hijack the thread.