Normally it hasn't smoked before until I let it sit, and usually it doesn't sit for more than 2-3 days at a time. And I havn't been able to really run it yet except around my yard and through my subdivision. It only smokes when I really lay on the throttle, and even then there is only little puffs of smoke before I shift. From a different site I was looking at they said it was a sign of bad valve seals. Could this be the problem? Flyinacez suggested the rings too which would make sense but could it be my valves also?