Glad to see some discussion on this topic on these old mopeds. Sweet site!!
I just picked up a Cimatti with same issue, no spark even when I attach coil directly from stator, I’ve just bypassed the whole harness since it’s missing I think some sort of light on top of headlight/speedo housing (blue wire), tail light (blue, grey, orange wires) and I think must have had a keyed ignition that got removed (yellow, grey, black wires) so I’m not sure how those should be wired and just bypassing for now seemed more prudent to get spark.
But even when I connect the the stator (blue ground, red hot) direct to coil, I get no spark. I’ve tried a couple different known working coils and plugs, no change. When I put my multimeter on it, the numbers jump around a lot, so I’m not sure it’s putting out enough juice to even get the coil to work.
I’m a little concerned there’s something wrong with the condenser or maybe somehow one of the windings in the stator are grounded somehow, any suggestions how to test it? I only have a digital multimeter.