piston ring position

Discussion in 'General Questions' started by garrett.4, Feb 17, 2015.

  1. garrett.4

    garrett.4 New Member

    I have taken off my head to replace it with a high compression head. While I had everything apart I changed all gaskets and my piston rings. Is there any certain position they need to be in when putting the cylinder body back on

  2. Arty

    Arty Active Member

    If the engine is a 2-stroke, the piston rings should be pinned so they can't rotate and catch an edge on the ports from the ring gap.
    With four strokes, I usually just offset the ring gaps depending if it's a two, or three ring piston.
    Keep in mind though - I don't claim to be a pro - just a tinkerer.
  3. garrett.4

    garrett.4 New Member

    It is a 2 stroke. What do u mean pinned so they don't rotate?
  4. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    The ring end pins face the intake.
    It's that simple.
    Of course the ring ends have to be around the pins......
  5. KCvale

    KCvale Motorized Bicycle Vendor

    There are 2 pins in the piston on the intake side about 8 degrees or so off to each side.
    The gap in your rings needs to match them to seat.