old_rider wrote on 10/29/14 at 10:34:44:I'm betting on electronic controls, and he uses his knees and feet.
I've been looking around a bit trying to find out more about this. I have found another video where he is in a gravel parking lot, and another where he is driving really slow on his way to Sturgis.
The brakes appear to be on the chariot wheels.
There appears to be a cable from the lower left side of the chariot that runs up along the left side of the bike.....I would guess that is the throttle.
Clutch is probably a Rekluse.
http://www.rekluse.com/exp_hd.shtmlThe bike is held upright by the chariot, as you can see the bike leaning a bit in the gravel parking lot as he drives/rides toward the camera.
https://www.youtube.com/watch?v=yG-Riw26Sx0