Check and clean all the earth/ground points.

Did you replace the reg/rec with a new one, or a used one? That's often quite symptomatic of a duff unit.

It's highly unlikely a PGM problem. The CDI side is very robust; it's only the RC side that's a little fragile, if the power valves aren't maintained properly.

I did however have a failing stator on my MC21 many years ago, and that did cause a similar issue. I would pull the flywheel off and check for a short circuit in one of the windings.
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Andy.
NSR-WORLD.COM

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