End play problems are a good thing to check. Or the spring-clips on the dist body are out of shape, or the cap's clip ears are mangled. Check for weird wear on the rotor button or inside cap.
Preaching the Hot Rod Gospel according to the 4-stroke apostles:
Or the spring-clips on the dist body are out of shape, or the cap's clip ears are mangled. Check for weird wear on the rotor button or inside cap.