Just don't break this engine in using the slobbery rich method like a ring engine. This could ruin this ABN engine. Use the hot breakin method. The engine should be emiting a two stroke sound but be rich enough to provide enough lubrication for breakin. I usually lean it just past the point the motor sound breaks into two stroke. To where it is missing occasionally. This is only for the first tank of fuel. After the first tank lean the engine for a clean but rich two stroke on the high speed needle. A little castor would help also.