hi , i had the same problem on my speedfight 2 50 ,  i had to buy a new CDI unit a speacial 1 to bypass the imobiliser  ( i got it on ebay) i pluged tht in and she went lol if u wnt any more info about ur bike  , or any more questions , here is my email addresss  mattphyallAKApigeon@hotmail.com  also on windows live messenger
                 matt phyall
                
 March 2009