dear all are same but it is having i think a big carburetor.. its venturi is large as compared to other china maal .. therefore despite being a 72 cc it has more pick and speed..
i think it is hain a dekni pz22 carb..
oh by the way when u open its carb measure the size of he the carb in mm . at both the sides. please do it.. also remove the rubber o ring on the engine intake side of carb when taking measuremnts to get correct results .. pz22 should be 22mm .. also honda cd 100 carbs venturi is 22mm..
waiting for ur reply