Puegeot speedfight 2, ticks over but wont start?

My puegeot speedfight 2 (02 plate) has very little spark, it ticks over but just wont start! I was out riding one day and it just cut out on me and hasn't started since, there is no lights coming up on the dashboard and the imobiliser has been bypassed, I have bought a nee spark plug, changed the coil but it's still the same? ive also tried putting petrol down the spark plug hole but that didnt make any difference, I can't think what it would be? the only other thing is an electrical fault somewher? please help?? much appreeicated