follow these instructions....there is a small screw on the bottom of the carb,undo it one turn and let all the fuel drain out then do it back up again,put a new plug in it (approx 3 pounds)make sure the battery is fully charged .try to start it by pressing the start button but dont give it any throttle at all to start with ,only when it has ticked over for at least a minute,ok that should do it if no then the carb needs to be stripped down and cleaned.
adam bike doctor
September 2006