I have that picture.The difference between setting the points at the arrow, with an ohm meter (2 degrees atdc) and at the crankshaft key, .020" (2 degrees btdc) is noticeable at idle. I can only imagine what is happening at full throttle with 4 degrees of advance added.
OK, reset the points to .020" at the crankshaft key.
Checked the timing.
.020" point gap advances the timing to 2 degrees btdc, at .023 the timing is 2 degrees atdc.
I'm new to the 2 stroke world but the 2 engines that I owned before this both have idle timing set atdc.
Any thoughts?