ok so i have a micargi panther that was a piece of work. the top rails that go back to the rear drop outs snapped completly in half and even the bottom tube of the frame was broke only after a month of havin it motorized. what i did was had a buddy weld 2 gusset plates to the bottom tube where the front motor mount is and put a nice thick plate over the rear rails remounted the motor and not a single vibration i beilieve the best way to mount these lil china girls is to first strengthen up the bike ur putting it on. i used to have problems with my chain hittin my white walls when it was spaced about a half inch now its barely 2mm spaced and a loose chain it doesnt even wanna hop around at all im tellin u this is the way to go guys im goin in on sunday to reinforce more of the frame