Ok, have questions. Earlier you said that you (did the 4 degree addition to the timing rotor/ curve).
From that I assume you cut 4*off the back of the slot on the rotor? (to advance the rotor)
That would make all the (rotor) timing marks off by 4*. (Correct)??
So, when you degree the cams;
will you redo all the marks and numbers on the rotor itself
or will you add a mark elsewhere to align the original rotor marks with?
Ride safe, Ted
Yes when you move the Notch for the locating pin over, it now is going to rotate over, against the normal direction of engine travel= Advance. this makes the factory marks move, since you're moving the Rotor on the pin. Using a Degree Wheel or Protractor, angle finder etc. It is easy to scribe another set of marks. I did a White Paint set. Once TDC is Verified, then permanent marks can/ will be made. Also the slop in the Pin Notch can be eliminated if so desired at that time.
A stock Rotor can be purchased if desired to re-set back. Also on Ebay there are Rotors Real reasonable, with a gasket, Like $45 shipped. Search for a Timing Rotor for a ZL, and ELS +4 should show up.