i was riding my kfx and all of a sudden it backfired and died. now it wont start. i pulled the plug out to check the spark and when it first whirls over i get one good spark and then nothing after that. every time i hit the start button i get one good spark, but nothing after that. any ideas?

 

Just for test purpose, connect a direct ground wire between the B/W of the ignition coil and the (-) of the battery. See if you are getting good sparks.