At this time, The engine look well done. I did not run the engine much because I spent a lot of time to make a real nice test bench as well as personalized exhaust headers and mufflers. Currently the engine is running in and the carburetor adjustment is very rich in order to ensure good lubrication to the internal parts. Despite this, the engine runs well and is very smooth running. On the whole I am very satisfied with this engine, but it is in the longer term that I will see if this engine is really reliable and durable.