DLE 55cc Cloned Petrol Engine Testing

This is my first engine of this size. I purchased it unused from someone to put in a 78 inch Extra 330. There is no label on the engine so I really do not know what brand it is. It looks like a Turnigy TR-55 55cc gas engine sold by HobbyKing. (said to be a clone of DLE55) I tested it with a Turnigy 21x10 wood prop. I can not wait for my order of a 22x10 prop to arrive. It started very easily and responded very well to throttle. Stable Idle speed: 1600 rpm Max speed: 7300 rpm I hope with a 22x10 prop, I would get the same rev (with some more tuning).