xr500/wiseco piston

Discussion in 'Thumpers' started by emti, Dec 3, 2012.

  1. emti

    emti Been here awhile

    Joined:
    Aug 26, 2010
    Oddometer:
    278
    Location:
    northern n.y.
    Im installing a new piston in a 1980 xr500. Im using a Wiseco piston. The directions for fitting the rings do not match the rings, they show bevels and and dots, while I have a gray ring marked "n100" and a brown ring with a grey outer edge marked "n100". The gray ring is wider.I believe the markings go"up" but which is the top ring? I cant see any bevels on the inside of the ring. Thanks emti
    #1
  2. mcma111

    mcma111 Long timer

    Joined:
    Jul 17, 2007
    Oddometer:
    13,078
    Location:
    San Francisco,Ca.
    Markings go up and the ring with the different color side/edge is the top ring.
    #2
  3. redprimo

    redprimo Been here awhile

    Joined:
    Jul 9, 2011
    Oddometer:
    571
    Location:
    central coast of California
    I installed the same piston in the same motor 6 months ago and ran into the same issue. The rings will only fit one way. The depths of the grooves are different and match the rings.
    #3
  4. emti

    emti Been here awhile

    Joined:
    Aug 26, 2010
    Oddometer:
    278
    Location:
    northern n.y.
    Thanks for the help, emti
    #4