skyline kid

Hi ive taken the engine from a late 600cc fzr and placed it into a go-kart. Ive wired pretty much eveything up and the engine will turn over via the starter motor when the ignition button is pushed but there is no spark????? The voltage at the coils is about twelve volts but it is constant and not in pulses like it should be to create the spark??? will this be something to do with the sensor placed in the magneto housing that pulses the volts to the coils or what???? Please help if you have a clue!!!! thanx.