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  • Date codes

    Someone wants to buy a -9 pan cylinder. That got me going again searching for answers on the codes. Where can I find some sort of list explaining what the letters and numbers mean? Same info needed for heads-trans cases-covers-ect.
    Also I have some cylinders with no markings and am 99% sure they are OEM, is that possible?
    Kerry
    Kerry AMCA # 15911

  • #2
    OK I just got another set of cylinders. Rear has no marks and ft., I believe is K 26-0.
    Kerry
    Kerry AMCA # 15911

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    • #3
      K 26 0 October 26, 1950
      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/

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      • #4
        Originally posted by Chris Haynes View Post
        K 26 0 October 26, 1950
        OK so does that mean December is A- Jan B- ect.? But how do you know if it's 1950 or 1960? And were there random year cylinders that had no marks?

        Thanks, Kerry
        Kerry AMCA # 15911

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        • #5
          I went back and verified that the K 26-0 I have does have a return hole drilled inside the bore, and it's too nice to have been done with a hand drill.

          Kerry
          Kerry AMCA # 15911

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          • #6
            hello check where the oil return hole is. bottom early/ late in side.

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            • #7
              Drilled inside of bore.

              Kerry
              Kerry AMCA # 15911

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              • #8
                Originally posted by kg993 View Post
                OK so does that mean December is A- Jan B- ect.? But how do you know if it's 1950 or 1960? And were there random year cylinders that had no marks?

                Thanks, Kerry
                Jaunary is A. I is often not used. 1960 would have a different numbering system.
                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


                • #9
                  Ok, so why does this cyl. have the 53-up return hole? Hate to keep asking questions but I can't make any sense out of the code except that A-M = months and the first #'s = a day date and possibly the last # = the last digit in a certain decade. How do you tell what decade the part was made in?

                  Kerry
                  Kerry AMCA # 15911

                  Comment


                  • #10
                    Could it be a replacement part cast in 1960.
                    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

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