motor is smoking

Discussion in 'General Questions' started by Rockjaw, Jun 7, 2015.

  1. Rockjaw

    Rockjaw Member

    so i just built a new bike 66cc 2 stroke..and the motor is smoking smells like burnt popcorn..sounds like its going to blow up..smoke from the head and front part of exhuast...did i get stuck with a dud motor? what can I do

    running 8z of 2 cycle oil per gallon

  2. The_Aleman

    The_Aleman Active Member

    Many here will say running 16:1 is too much oil (128/8 = 16). As not all chinagirls are created equal, one has to figure out what makes their particular engine happy.

    I suggest running less oil. A general guideline is 24:1 (5.33oz) on break-in and 32:1 (4oz) after. Make sure it is not marine 2-stroke oil. Must be for air-cooled engines.
  3. crassius

    crassius Well-Known Member

    I'd be looking for a loose/bent muffler flange or a leaking head gasket.
  4. butre

    butre Well-Known Member

    is it a painted engine?
  5. slimmy 23

    slimmy 23 New Member

    Ur motor smokes cause ur fuel is too puttn to much oil n ur u need to make sure ur carb needle is at the top motch