No one is doubting the power of a 55cc gasser.
We're doubting the weight claims of 2 lbs.
Stare really hard at either an OS 1.40 RX or a Supertigre 2300 and then tell me how you add a pumper carb and an ignition and a set of reed valves and a spark plug and a steel con rod instead of an aluminum one and DOUBLE the displacement without gaining weight.

This sounds like Enron and Arthur Anderson are weighing the motor.

Will it weigh 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, pounds?

Perhaps they rounded 2.8 lbs down to 2 lbs???