Outer diamond primary

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • DANPATCH
    Senior Member
    • Apr 2009
    • 306

    #1

    Outer diamond primary

    How do you tell the Outer diamond primary original from reproduction .I thought it has something to do with how the diamond was stamped.
  • Rubone
    Senior Member
    • Aug 2004
    • 4763

    #2
    The way the diamond is stamped is one thing, the depth and shape of the sprocket clearance is another. Originals have a pronounced radius where the diamond meets the domes, aftermarket are straight. The front sprocket stamping is a very shallow domed area, aftermarket are taller and more square sided.
    Robbie Knight Amca #2736

    Comment

    • larry
      Senior Member
      • May 2009
      • 247

      #3
      Has anyone ever reproduced a cover with the correct dome?

      Comment

      • Jerry Wieland
        Senior Member
        • Jan 2006
        • 2007

        #4
        Originally posted by larry View Post
        Has anyone ever reproduced a cover with the correct dome?
        If someone has I have never seen it. Jerry

        Comment

        • Chris Haynes
          Curmudgeon
          • Jul 2002
          • 5939

          #5
          As far as judging on a restored machine goes, if it is the best reproduction available it is fine.
          Be sure to visit;
          http://www.vintageamericanmotorcycles.com/main.php
          Be sure to register at the site so you can see large images.
          Also be sure to visit http://www.caimag.com/forum/

          Comment

          • EricOlson
            Senior Member
            • Jan 2011
            • 575

            #6
            Here's a picture showing the area Robbie is talking about. You can see the difference circled in red.

            Primary differences.jpg
            Eric Olson
            Membership #18488

            Comment

            • pan620
              Senior Member
              • Oct 2016
              • 223

              #7
              Originally posted by Chris Haynes View Post
              As far as judging on a restored machine goes, if it is the best reproduction available it is fine.
              So what is the best reproduction that is available

              Comment

              Working...