Engine stop will not restart

yea you could have jumped time. If you look at the mag rotor its keyed with a wood ruff key.
I wonder if you have a good spark and fuel in the carb? can you get fuel to flow out of the carb by using the tickler button on the carb? If you can't and your spark plug is dry I'd see first if you are getting fuel into the engine. Then look at the mag rotor. Could be your tanks fuel strainer is clogged. Your fuel line can look full and not be flowing fuel to the carb. If its been running then just shuts off and won't restart kind of like it ran out of fuel which mine will sometimes do I take the gas tank cap off and pressure up the tank with lung pressure to get the fuel flowing again sounds unsafe and looks funny but it will open up a fuel stoppage. I try to do this where no one can see me doing this like pedal to an alley or back to the house don't need the neighbors thinking I'm so in love with the bike that I'm putting a lip lock on it.
Sounds nasty and it is but I hate to have to pedal when I don't have to.
So far I have not had the tank get a vacuum lock as my gas caps leak when I put too much fuel in the tank. I can take off the gas cap and until I give the tank a little pressure it won't start so I know there is a little booger stopping off the fuel line some where. I have this problem if I let the bike set for a few days and see the fuel line looking dry along with the inline fuel filter being dry looking. Its a caveman way of getting it going but it works just don't inhale when giving the bike's tank a little kiss.
Do not french it either that would be really nasty.
Norman

Check your leads to the CDI if they're nice and tight pull your plug, connect the plug wire, lay it on the head where you can see the gap, engage the clutch and walk the bike forward to see if you have a good spark.

Unhook your kill switch and check again. I've heard of others having problems with theirs going bad.

Both ends of the spark plug wire screwed on tight? Got a new spark plug gapped at 0.020. Then if no spark take off the mag cover take off the mags rotor bolt pull off the mag rotor see if the wood ruff key is sheared if it is you can either make or buy a replacement key they are a metric size but a few minutes with the dremel and a fiber cut off wheel you can work over a wood ruff key to make it fit then its motor time.
You can use a very small dab of super glue to keep the key in place as the magnets in the rotor like to pull the key out of its slot when you try to put the rotor back in place.
Norman

Black is ground, if you're not getting power off the blue wire at all you probably have a bad mag.

kind of sounds like you might have a bad mag coil or a bad cdi. did you take the mag coil off and make sure all the wires are soldered on? one wire is soldered to the frame of the mag coil and is kind of hard to see.

it sounds like you have a bad mag those thing could give a false reading

check the plug first

Ya really think its the CDI? 9times out of 10 if i have a problem its a fouled plug,i always worry in worst case,the ocd tends to overthink things but fortunatley cleaning or changing the plug has been the fix,sometimes if the clutch wants adjusting it can give you grief as well....Good luck,tell me how you make out.

douse your motor work yet?