I had the bike running and was trying to tune the carb. i was struggling to get it tunes so i shut it off and quit for the night. I came back out the next day and no i dont have any spark. Ive put new cdi box, coil, and a new kill switch assembly on it and still nothing, i have not went any farther than that. I am wondering what else to check into. I unplugged black wire from CDI box and still nothing. Please help thanks.