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Blue smoke on start up.

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Hey guys, have a 2012 RMZ450 and noticed abit of smoke on start up but when it warms up it's gone. Is it just from waiting till heat expands for everything to fit right or is it rings or valve guides??

Thanks

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Normal... mine has done it since new and through 2 motor rebuilds. After a few blips of the throttle it is gone.The bike dumps a little extra fuel for start up. It will get worse as the temps outside drop.

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Blue would be fine, since oil and fuel will get by the valves and guides until they expand a couple seconds after startup.

I noticed this too as a dark blue smoke for a couple seconds, but it went away, so I just shrugged it off as everything expanding.

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