I understand your point, but i wasn't referring to more modified bikes like the one shown in your pic with a modified carbie etc...Im only referring to stock motors, carb system, exhaust system, etc, so as to avoid over torqueing the rear wheels original design, function and longevity was all.This is how they break. This is not from rim brakes. This is from being cheap chinesium. When theses wheels break its always catastrophic. When a spoke breaks you can usually replace the broken spoke or spokes and fix the wheel.
Definitly also not referring to racing bikes either...lol...I always build mine to be pedal assist from a dead stop so as not to overtorque and strain the overall drive train but to let the motor power ease into the situation...DAMIENI believe that I can't remember seeing the mag-type wheels at Motorbicycleracing in southern California.