HI I just rebuilt the top end on my R and replaced the oil seals in the bottom, but any way when I start my R up until it gets warmed up it seems to smoke a little bit. Is the smoke blow by until the top end gets warm and expands? Once it is warmed up it will stop smoking for the most part, just what a 2 stroke (2 smoke) should be smoking anyway. Is this going to hurt anything? I have a 89 cylinder on 86 bottom end with the long rod and spacer plate with 2 gaskets. It has been bored to a 68mm and has the 86 style piston. just curious if that is whats causing the smoke and if that will hurt my engine?