Have a 2005 GT200, been running great since purchased, 6500 total miles. Recently I did some maintenance, incl valve clearance check. When I completed misc maintenance, I lost ignition (no Spark). I did some voltage checks & tried to determine failure. Took some vantage readings at CPU but didnt find anything. Surprisingly, when I completed these, it started & ran for a short ride. When I tried to restart several days later & it failed again, no spark.
I bought a cheap non-OEM coil & swapped it, no help.
Is there a diagnostic flow chart or similar that I could follow to diagnose?
Im new to Vespa, but have been wrenching on Motos for decades & am a good wrench.
Hoping for some help, Thanks
Jack in Chcicago area (Hoffman Estates, Il)
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