fitting of non immobiliser cdi speedfight 1 lc 50 cc?

i have a cdi and and seperate immobiliser on a 1999 speedfight have traced the wires that i need to fit a non immobiliser cdi as fitted on the first sppedfights the alt is the 4 wire type so i can do away with the set up of the original cdi - immobiliser i understand that the first speedfights didnt have immobilisers fitted , but now this is fitted and all wired up as to the wireing diagrame i still have no spark am i over looking something