What gaz/oil ratio are you using ?
How about your plugs ? are they the recommended ones for your bike if they're not "hot" enough they're not burning all the residue from the combustion cycle.
Of course if you rebuilt it and gaskets weren't installed correctly or piston rings aren't seated right fuel mix could be getting blown right out the exhaust.
__________________
Yadda yadda yadda, whatever, they ain't going to listen anyway. |