You could pull your plug out and hold it next to your motor and crank the motor. But that's hard to do with these bike's.

I use a Spark plug tester...Pull your plug out so the motor will crank easier
It can be picked up at any local auto parts store. Or you can make one using a spark plug and aligator clips. Just solder the aligator clip to the plug.




You could also make one like Norman's....Tester for ignition