Why 66cc/80cc? Which is it?

Discussion in 'General Questions' started by TheNewbie, Jul 31, 2013.

  1. TheNewbie

    TheNewbie New Member

    This might be a stupid question... But I've tried searching and I'm not really coming up with an answer.

    Why do they advertise two engine sizes? How big are these engines? Are there 2 ways to put them together or something?

  2. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    It's marketing hype or to be blunt lies.

    The story is that the Chinese count the volume of the combustion chamber to
    make up the 80 cc from 66 but that story breaks down when you see they don't
    measure the 48 cc motor in the same exaggerated way.

  3. TheNewbie

    TheNewbie New Member

    That makes sense. Thanks!
  4. wally

    wally Member

    Easy! A lot of places specify 49cc as the biggest motor where a liscence is not needed. Doesn't 80cc sound BIGGER than 66cc? Yes you are correct in saying that the total volume is compared with swept voulume.
    And swept volume is correct at 66cc but 80 sounds faster!