250cc zongshen blowing smoke

[lo-cou]

gday fellas,
i was wondering if you could help me out,im on my 3rd tank of juice about to finish the run-in and i notice today when i back off throttle it puffs out a bit of smoke(dark grey/blueish),the fuel i put in is pretty oil but i doubt its stale,the only thing i could think of is too much oil,i filled to the dipstick which was 1L,
any suggestions boys?

[m0p]

is the bike 2 or 4 stroke?

[Matty]

it would be a 4 stroke im guessing...the same happens to my 125. except mine blows heaps lol. its just burning oil, nothing too serious i dont think...but keep an eye on your oil level...i ran out once.

[pitmaster]

i reckon it was you i read about how you ran the engine in,

was it you that gave it a thrashing from day one to run it in?

[lo-cou]

i went by motomans theory,putt arond for a while then open her up in every gear,putt for awhile open her up etc etc,could stale fuel blow a bit of smoke?