I agree with RCKen. Make sure you have good, clean fuel and you are not in a very dirty environment. Make every precaution including safety. Do not get lazy with anything, a very well broken in engine will last you a very long time. It will also show you any problems you may have before you put the plane in the air. Check your fuel lines for any leaks, and most of all (RCKen, feel free to correct me anytime), check everything several times and to make sure you have smoke coming out of your muffler. No smoke can mean it is too lean...this is not good.