getting back to the question, you broke the engine in the wrong way, this maybe why your rings did not seal, but, since you are doing all this for the first time follow the instructions referenced by Jack ( boss wrench ). Your rings will seal in time providing your air fuel ratio is correct. Running to rich ( to much fuel ) washes down the cylinders eliminating the oil that seals the rings to the cylinder wall, this is called glazing and is normally again caused by a blown power valve, incorrect over jetting or in a word your carburetor.
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