@Darth_Vado,
You might not know this. In order to do wheelies they need to swap the brake levers. Then they can modulate the throttle with one hand and the rear brake with the other. But if it is hydraulic, then the reservoirs are upside down. It will work at first - until it suddenly doesn't.
All you need to do is swap the hoses and do minor top bleed! One kid in So Cal had it happen while riding with a regular bike helmet and a car's wheel ran over his head. The parents had to identify the body of their kid who thought an eMoto was cool.