crf450 smoke

I have a2008 crf450 and when I first start it puts out a lil smoke but once it gets warmed up to operating temp it dosnt do it all anymore . and it has a newer top end on it with new valveseals piston rings etc. is this normal for crfs

Sounds like the rings aren't seated properly (cylinder out or spec and/or not properly prepped prior to installing the new piston OR improper break-in procedure) or leaking valve stem seals.

How much is alittle? A puff or two when you first start it seems to be the norm for all CRF's

Mine doesn't smoke at all. Puff on startup is typically valve stem seal.

Its just a little puff or two and I also forgot to put in the original post its also when the choke is on

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