1939 Big Twin Rear Fork

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  • Shane Briggs
    Member
    • Nov 2011
    • 76

    #1

    1939 Big Twin Rear Fork

    Need a 1939 BT rear springer fork. Will purchase outright and/or trade my 1940 fork. Thanks
  • exeric
    Senior Member
    • Sep 2005
    • 5972

    #2
    '39, and '40 are the same kicked forward rigid fork. The spring fork may have different numbers between 3 and 5, but that can be verified with Palmer's new book. The rockers are all the same and that would be no boss at the zerk fitting.
    Eric Smith
    AMCA #886

    Comment

    • Jerry Wieland
      Senior Member
      • Jan 2006
      • 2012

      #3
      I believe he is right that 1939 and 1940 BT rigid forks are different. The basic fork is the same but the brake anchor is different. The late 1938 fork might also be the same as 1939.

      Jerry

      Originally posted by exeric View Post
      '39, and '40 are the same kicked forward rigid fork. The spring fork may have different numbers between 3 and 5, but that can be verified with Palmer's new book. The rockers are all the same and that would be no boss at the zerk fitting.

      Comment

      • exeric
        Senior Member
        • Sep 2005
        • 5972

        #4
        I've had a number of early forks and the differences I saw in the brake anchor seemed to show up when electric welding came on line. I'd like to see pictures of the subtle differences, as I have a friend that's building a 1940EL; and I also don't want to mislead Shane.
        Eric Smith
        AMCA #886

        Comment

        • exeric
          Senior Member
          • Sep 2005
          • 5972

          #5
          I should have dug out Bruce's new book before I spouted off. I see there are significant differences in the brake anchors.
          Eric Smith
          AMCA #886

          Comment

          • T. Cotten
            Gadfly from the Dumpster
            • Jun 2001
            • 8221

            #6
            Originally posted by exeric View Post
            I should have dug out Bruce's new book before I spouted off...
            I'm afraid to get mine dirty.

            ....Cotten
            AMCA #776
            Dumpster Diver's Motto: Seek,... and Ye Shall Find!

            Comment

            • exeric
              Senior Member
              • Sep 2005
              • 5972

              #7
              That is funny Tom; but Bruce wants people to get them dirty and dog eared so they'll buy another copy.
              Eric Smith
              AMCA #886

              Comment

              • T. Cotten
                Gadfly from the Dumpster
                • Jun 2001
                • 8221

                #8
                Eric!

                I'm glad I kept one copy of the first edition, as it has info missing in the second..
                (And my correction notes are more accurate.)

                If I get laid up, I'll have time to study the second, with clean fingers.

                ....Cotten
                PS: I already ordered the first three copies of the second.
                Last edited by T. Cotten; 04-22-2015, 01:03 PM.
                AMCA #776
                Dumpster Diver's Motto: Seek,... and Ye Shall Find!

                Comment

                • Shane Briggs
                  Member
                  • Nov 2011
                  • 76

                  #9
                  IMG_0555.jpgIMG_0553.jpg

                  Here is the difference in the brake anchors; the blasted fork is the 1940 fork and the painted one is a 1936-7 fork. A 1939 anchor would have been welded and brazed to the fork. 1939 forks would also have the neck slot milled into the side of the stem for the early dampner pin. Thanks

                  Comment

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