I would make a jig to spin the trigger disc and monitor the output of the sensor using an osciloscope. I expect you will need good quality cable, at least, to maintain the trigger waveform at high speed. your ECU also needs to be able to monitor the frequency. From my own experience you really don't need so many teeth. Yamaha only had 4 teeth for the standard ignition triggering, and fuel injection is way less critical as far as timing goes.