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Atlas Header pipes

Discussion in 'Other Norton Motorcycles' started by possm, Mar 14, 2019.

  1. possm

    possm

    Joined:
    Jul 3, 2009
    Hi Guys I am restoring a 1966 Atlas and I note looking through the Roy Bacon Norton Restoration book that period photo's appear to show the Atlas (and 650SS) with 1-1/2" diameter Header pipes. I note that Andover, Armours Feked etc only offer the 1-3/8" alterative, I am aware that the Commando came out with 1-3/8 pipes std, is there an advantage in either? I think I prefer the look of the 1-1/2 pipes though am unsure who supplies a quality set.

    Thanks Al
     
  2. Mike B

    Mike B

    Joined:
    Oct 16, 2015
    I believe U.K. home market bikes came with 1 3/8 pipes, while U.S. export bikes came with 1 1/2 pipes. Their seems to be a consensus that the bikes run better with the smaller pipes...don't know from personal experience, but I prefer the smaller pipes.
    Mike B.
     
  3. Gilesy

    Gilesy VIP MEMBER

    Joined:
    Aug 27, 2017
  4. possm

    possm

    Joined:
    Jul 3, 2009
    Thanks Gilesy, I made the mistake of buying a set off RGM when I restored my 650SS, didn't even look like fitting, had to heat bend and re chrome, I complained to RGM as I am half a world away and of course "they had never had a problem before".
    Al
     

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