blue smoke

[AtvRider21]

well yesterday i rode my 400ex alll day only 1 hour rest and from 11.00 to 6.00 so it smoked a lil blue out of the pipe is that because it was hot thanks

[ESR250R]

usually that mean that its burning oil and that u have run the engine too lean. it might be wise to start looking into getting a new top end

did u happen to flip it over or tip it, that could be why its smoking or you may need a new top end