My savage runs pretty good but i have no other nitro rc cars (beside my friend and his brother which are worse about these thing then i am) to compare my performance too. I have a steady idle speed and i have good acceleration (not pulling whellies though like I've seen in some vids), my main concern is that once i accelerate it will get to speed but it takes a couple seconds for it to shift into second in which it sounds raspy, I'm almost possitive this is a sign of over-leanness but not completely sure. I do not see significant amounts off smoke at an time, there is some light smoke when i give it WOT but not the thick trail i think I'm supposed to have, can someone please help me?? My main concern is the un-smoothness of the high range rpms.