I replaced my rotor and cap some time ago ( 1 1/2 year ).  Started having issuses with high speed rpm ( just was not running good )  A course over looking the simple check everything but the basic.  Finely pulled cap and rotor and low and behold the problem.  
So when replacing the new rotor seamed to not be a tight fit as the one that came off.  I think that because of this the rotor must move up and down on on shaft causing it to dig into cap.  i looked over everything on dizzy all seams good, so I go back to this loose fitting rotor.  Went to three different parts store and all rotors seam to be a loose fit.
Has anyone else had this problems, or am I just not seeing something. Where might I find a rotor that has the tight fit?