485 no spark

which coil did you replace?

Did you replace the lighting coil or the ignition coil? Sounds like too me that your stator is shot. 1 volt to the coil is a far cry from the proper 12 volts that it should be getting. I would replace the stator.
 
I would use a digital multi meter and check the output of the pulsar coil first,this is down on the engine, inside the flywheel. It should be varible voltage like around 2-3 volts with a pull of the recoil, this sends the voltage to the cdi where its then sent to the ign coil.
 


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