Forgot about everything and focus on one thing & that is your firing mark!
Use a drill, sharpie & timing light!
Make a line on the case near the flywheel rim and Put a bunch of lines on the flywheel randomly and number them.Spin the flywheel with the drill While using the timing light, find a number that is close to The light flashIng , remove all Other the lines and numbers with alcohol. now put a bunch of lines Very close to the line You kept & number them. Using the drill and timing light and should find that one of these lines matches up perfect with your Case line! This is your firing mark, it will never change so take a nail & make a permanent line with the letter f on your flywheel.
now using a piston degree tool find 14 degrees, push the piston right up against the tool ( compression stroke) and install the flywheel with the case line and firing line matching up.
If you don’t have a degree tool you can actually just use the flywheel with paper measuring tape and a long plug.
You’ll have to spin the flywheel pretty fast with the drill with a cdi to get the timing light to kick on (edited)