Ok, here's my update so far: i changed the spark, rebuilt the engine and sealed leak proof, but still overheats, i leaned out both needles farther than the factory defaults, by 1 turn; set the idle screw for 1 mm gap; there are two things that mainly concern me now: the car goes forward without pulling the trigger with this idle setting, and if i rev down it turns off; and the other thing is that the muffler still spits oil and sometimes gas, is that normal? as i learned it should do that only during the break in process