hi, i am new. my name is blah, blah, blah. i need to replace my rings.

Discussion in 'General Questions' started by ras1lbdas, May 3, 2015.

  1. ras1lbdas

    ras1lbdas New Member

    How's it going, fellow motor bicycle fans. I have been tooling around with these things for a couple months, and this is my second build.I have to replace my rings and I need your assistance. Whalt size rings go.in a 2 stroke 66cd motor. Your average. .motor. Please help

  2. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    There is only one size of rings for the 47 mm bore 66 cc aka 80 motors.
    There are 2 different pistons but they both use the same kind of rings.

    Why do you need to replace your rings?
  3. ras1lbdas

    ras1lbdas New Member

    I did replace them because my compression was low, yet I still haven't got any spark. I am really frustrated. I had a great bike, but it got stolen. It's a mad world.
  4. crassius

    crassius Well-Known Member

    except when a ring actually breaks, I've not seen rings cause a serious loss of compression
  5. jaguar

    jaguar Well-Known Member

    ring gap is so large on this engine
    too much compression loss even with new rings
    that's why I put motorcycle piston/rings in my engine
  6. butre

    butre Well-Known Member

    that reminds me of something I've been meaning to mention to you. on your website (this page specifically) you advocate using a hoca piston, but if I'm not mistaken a those pistons require use of a reed valve. You never mention that in your writeup. You also neglect to mention the fact that there are two different pistons for the 66cc engines that aren't interchangeable, and that the hoca piston will only work for one of them.