...you are the third person that has advised me that maybe my tuning was a little off, which may have contributed to my problems. I tend to run the bottom end a little rich, in order to cool the motor downa little quicker when it revs down. I usually like to see the motor cool down at least 2degrees every couple of seconds wen it revs down and is idling; maybe that's too rapid of a cool-down. Maybe the motor was a tad too rich?. I also tend to lean the top out a bit more since the bottom is rich. I need to re-think my tune definitely. Have to find a proper balance between the two settings. This motor is defintely worth keeping in the arsenal for sure.