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What do I have?

Discussion in 'Other Norton Motorcycles' started by triumph2, Jan 15, 2020 at 3:52 PM.

  1. triumph2

    triumph2

    Joined:
    Aug 13, 2008





    https://imgur.com/W1J47Gz
    Looks like it’s a late ‘68 Atlas motor. The pushrods look unusual, the tunnels in the head have been opened up. Bore is in new condition and the inlets have a fine Matt finish and I think they’ve been cleaned up.
    It runs strong, has very high compression and doesn't smoke but it has been standing for years and leaks like a sieve hence the teardown.
     
    Last edited: Jan 15, 2020 at 7:30 PM
  2. texasSlick

    texasSlick VIP MEMBER

    Joined:
    Jan 2, 2013
    If there is a "2" in front of 0/, it is an Atlas.

    Save those pistons .... they are rare as hen's teeth.

    Slick
     
    triumph2 and Bodger like this.
  3. triumph2

    triumph2

    Joined:
    Aug 13, 2008
    fixed the photos, google photos sucks! Back to imgur.
    It is an Atlas. I'm curious about the pushrods and the pushrod tunnels being cleared out.
    What is special about the pistons?
     
  4. texasSlick

    texasSlick VIP MEMBER

    Joined:
    Jan 2, 2013
    In the first images you put up, the pistons appeared to be the original dished type, but now I see they are not.

    So, nothing special about the pistons ..... I will call my optometrist in the morning.

    After blowing the call on the pistons, I am afraid to say anything about the pushrods, but they look stock to me. I will compare to my originals in my bin in the morning.

    The tunnels may have been opened up to make fitting the head a bit easier.

    Slick
     
    Last edited: Jan 15, 2020 at 8:39 PM
  5. triumph2

    triumph2

    Joined:
    Aug 13, 2008
    I checked the pics on the Andover site and their pushrods look similar to Commando ones with a steel tip at each end
     
  6. possm

    possm

    Joined:
    Jul 3, 2009
    pushrods are different to the ones in my Atlas or my 650SS.
     
  7. Bernhard

    Bernhard

    Joined:
    Apr 20, 2011
    Dunstall made dural, along with other pushrods from other pattern parts suppliers.
     
  8. Bodger

    Bodger VIP MEMBER

    Joined:
    May 9, 2017
    Made same mistake re piston dishing. Wish someone would make them. I will look at a set of probably stock pushrod over the week end.
     
  9. Bernhard

    Bernhard

    Joined:
    Apr 20, 2011
    If you want to get back to the unobtainable dished pistons at 7.5:1 you could always make a plate to go under the barrel to bring the compression down.
     
  10. texasSlick

    texasSlick VIP MEMBER

    Joined:
    Jan 2, 2013
    I looked at my original pushrods. They have the screw on tips as in the AN pictures.

    Slick
     
  11. triumph2

    triumph2

    Joined:
    Aug 13, 2008
    The bike when I picked it up.


    Manx cafe style. Rearsets, oil cooler, Dunstall fairing etc. It'll be interesting to see what is inside the bottom end, cam?
     
    nortriubuell likes this.
  12. Bodger

    Bodger VIP MEMBER

    Joined:
    May 9, 2017
    Great minds think alike - did that.
     
  13. kernel65

    kernel65

    Joined:
    Nov 11, 2012
    Pushrods look like an alloy type made by Wassell.

    Scott
     
    triumph2 likes this.
  14. triumph2

    triumph2

    Joined:
    Aug 13, 2008
    I did a search and found a NOS set on ebay and they look identical with a steel cap on the bottom and machined alloy top end so Wassell they are.
     

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