Hadn't seen one of these in years, I mostly enjoy vintage British cars and they hardly, if ever used rev limiting rotors.
Working on a '74 BMW 2002 project and found a proper NOS Bremi rotor. I always thought these were clever; the flyweight moves outward w/ increasing revs until it contacts the upright contact and grounds the coil to the distributor rotor until revs decrease. Simple and almost fail safe. Pricey though, why many if not most are replaced with the basic ones.
Working on a '74 BMW 2002 project and found a proper NOS Bremi rotor. I always thought these were clever; the flyweight moves outward w/ increasing revs until it contacts the upright contact and grounds the coil to the distributor rotor until revs decrease. Simple and almost fail safe. Pricey though, why many if not most are replaced with the basic ones.