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Cam runout

Discussion in 'Norton Commando Motorcycles (Classic)' started by jimbo, Apr 3, 2019.

  1. jimbo

    jimbo VIP MEMBER

    Joined:
    Sep 25, 2004
    What is the max runout on the seal area of a camshaft? I measure .005"
     
  2. dynodave

    dynodave

    Joined:
    May 28, 2003
    My NOS 06-1084 real original norton factory = 0.000"

    My later, bent from new, combat cam = 0.0015" runout
    I had expected more, but I did try to press it straight and ended up using my new from shenstone norton combat cam that I picked up when visiting norton. Pete Kogut and I were there to interview Philip Leroux(sp) for the INOA newsletter.
     
  3. acadian

    acadian VIP MEMBER

    Joined:
    Mar 5, 2010
    I just assembled a motor with a new cam, thrust washer properly oriented and placed, and with new cam bushings in the cases (1 piece, tophat to the inside).

    With the cases assembled and no cam sprocket or tach gear, and with the cam pulled up against the TS bushing, the cam lobes were perfectly aligned with the followers and the cam journal lip sat flush with the edge of the TS bushing in the timing chest.

    With the cam sprocket and tach gear installed I have 0 runout.
     
    Last edited: Apr 4, 2019
  4. jimbo

    jimbo VIP MEMBER

    Joined:
    Sep 25, 2004
    Deciding .005" is too much . I gotta a new cam coming, this is getting expensive:eek:
     
  5. Danno

    Danno

    Joined:
    Feb 7, 2010
    Didn't someone mention a sleeve that could be pressed on after turning the seal run surface true?
     
  6. jimbo

    jimbo VIP MEMBER

    Joined:
    Sep 25, 2004
    Yea ,but the threaded hole to mount the rotor would be OOT also
     

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