1982 ignition timing ?

I just did a rebuild on my 1982 430 with a motoplat mini6 ignition and had the flywheel off. Does anyone know how I set the spark timing? It doesnt appear to have timing marks.

i suspect that you find 2.0mm before top dead center, and at that point some holes to align the flywheel to stator plate, then tighten stator plate screws. maybe the 430 is set at 1.5mm btdc, i forget. is there a small pinhole in the flywheel that would lign aup with the stator?. if not then you would probably need to measure and set it with a timing light. measure for the prescribed timing for the btdc, make some reference marks( one on case and one on flywheel as close as possible to eachother) then use timing light with external power source, but still feeding from spark plug wire, a kick over the egine to see how far off are the marks you made. then adjust the stator to align the marks. recheck and adjust to align the marks. BE VERY CAREFUL NOT TO ROTATE THE ENGINE WITHOUT THE SPARK PLUG CONNECTED AND GROUNDED- IF A SPARK CANNOT PASS TO GROUND HIGH CHANCES OF BLOWING THE CDI BOX!!!
the easyest and most accurate i think would the measure, mark and check by timing light

2.0mm BTDC works great on the 430.

my cdi box blew cause i forgot the warning, i replaced it with a vespa unit, wich dont work perfect, seems the position sensor/timing pulse pickup coil puts out too high of signal at high rpm, then no spark until rpm lowers. so with 2 resistors i make a voltage divider, to cut signal at high rpm, but then i loose spark at low rpm. and the unit seems to not have dwell or delay for any advance curve. so im gonna try a different cheap import cdi box