Hello,
I prayed for help, I plan to install a megasquirt to control the ignition and control of secondary injectors.
Stock injectors controlled by the stock ECU.
The problem is that the stock ECU not connected CRANK and CAM sensor to ground.
Megasquirt on the crank sensors (+) connects to pin 24, and cam sensor (+) on JS 10 , a second wire from the sensor goes to ground.
How to connect simultaneously to the stock Hayabusa and Megasquirt ECU, Crank and Cam Sensor?
May be installed diode on the ground that goes to the stock ECU.
So stock ECU would not contact with ground, while the Megasquirt had connections with ground sensor.

Thanks and sorry on my bad English :-(