blowing a lil black smoke

[Quad Dude]

ok i have an 04 450r and noticed that she blows black smoke when i rev it up. is this from being jetted a lil too rich? it dont burn any oil??

[Drewltr450]

yea sounds rich if it was oil it would be blue

[chevys&honda$]

x2 rich!!

[hardkoratvmxr]

need a little more info. is it just on startup? all the time?

if at startup when cold i wouldnt change any jetting if that is the only time it is doing it

all the time it iis just rich and a simple main jet or even air screw adjustment is needed