how did it run when you started it, was it reving on its own, if so you may have a air leak. you should do this test to be safe.
you dont want to lean out bike. pull plug and see how it looks what color is it, dark is rich very light brown is lean, you want a paper bag look.
i would check ground on frame first. then check wires that come from bottom of stator cover for cracks or rash from the chain.
check ohms and make sure stator is lined up. make sure air filter is clean.

now here is how most of us start a zilla.

from cold motor
pull choke leave off, turn on gas kick over motor a few times. this will prime fuel system

turn on bike
roll motor over with kicker till you hit 2nd hard spot with the kicker, try to have it at top then kick fast.
do this every kick, roll it over till you get 2nd hard spot with kicker. might need to give it a burp on the thrtl 1 time, but if it runs
it will start that way, plus it save your foot.