The motor only has about 10 hrs on it since I rebuilt the motor, with the FST big bore kit. When I accelerate real hard the bike will smoke slightly, not a lot but enough for me to not like it. Now is it a dirty filter, carb not jetted right, or I didn't let the rings break in properly, please don't tell me its this one I really don't want to pull the motor apart again.

 

maybe valve guides if it is a blue or grey smoke if black it's the jetting

 

Yeah its blue smoke, although not a lot, but enough for concern.