A few light scratches may have resulted from debris. Contact between the rotor and stator could cause a timing issue or no spark. They are generating timing or clock pulses to the ignition system. From what I’ve seen, the rotor and stator are sold as a set which makes me believe that they are a matched. But that theory could be all wrong.
That’s a good idea to have Norm compare his resistance reading with yours.
LAD Specialties / tony kart / rotax / kt100