Difficult to say the exact degree number’s offcourse, depending the stroke, cilinder-timing, cc’s, carb,, muffler, ignition settings and the fact that there are different disc’s with different inlet periods, but this system will work without knowing the numbers.
Inportent is that one of the 6 points from the disc-holder is exactly in-line with the center of the big-end, then you have only find the one of 12 position’s from the disc like on the foto to have the right timing.
I promise you, it will work just fine.
Do you see the centerpoint’s all in line with top dead center ? this is the way to mark de disc and disc-holder for the next assembling.