Im confused, There seems to be two videos of the gyro and a test flight. One shows no redrive, just a car axle and bearings and prop on one end, using the engines internal gears to do the redrive part. then another video where it looks like a geared reduction separate from the engine?
The first video is with the common redrive with a belt. From what I understand he had an issue with that redrive. So then he makes a redrive using the transmission of the suzuki and a driveshaft from a vehicle. The first test flight using the driveshaft resulted in the boot torn apart here.