Speedfight 2 50cc & 100cc Engine & CDI failure?

I have two bikes, one 100cc speedfight 2 and one 50cc speedfight 2, the 100cc frame is all bent and unridable, so i decided to take both engines out of both bikes and put the 100cc engine in the 50cc frame. it all fit in ok and all pipes/cables went back correctly, i changed over the 100cc CDI unit to the 50cc frame aswel. i tried starting the bike but with no luck. the electrics and ignition on the 50cc frame were left on there but i do have the 100cc ignition cables. so to clarify i have a 50cc ignition and electrical system, 100cc CDI unit & engine. i do not have the master key for the 100cc CDI unit either. would i need to put my origional 100cc ignition system on the 50cc frame with everything else aswel?
Matt