Announcement

Collapse
No announcement yet.

Newbie with question

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Newbie with question

    What does an engine number like 25JRCA##### mean?

  • #2
    25JDCA? Are you positive its an R?
    Could it be a re Stamp?
    Mark
    Mark Masa
    www.linkcycles.com

    Comment


    • #3
      I do not have the bike to look at any more. I grew up visiting and looking at it as often as I could. I recall the stamping of the numbers was very deep and clear. However, I did not write them down; the owner, my uncle, did that for me but he may have taken the numbers off the registration slip. His writing is very clear as well. The only possibility that he was wrong would be that the registration slip was wrong and he never noticed it. It was last registered in 1945, if I remember correctly. Is the "R" the only thing that is puzzling to you? What does the CA mean?

      Comment


      • #4
        It just indicated that the motor is fitted with aluminum alloy Pistons. In 1923 and 1924 there were the following 74" models.
        JD and FD
        These were the standard motor with the standard iron alloy Pistons

        JDCA and FDCA
        These motors used aluminum alloy Pistons.

        JDCB and FDCB
        These motors used an iron alloy piston that was lighter than the standard iron alloy piston.

        In 1925 they dropped the JD and FD models and only had the DCA and DCB models.
        I've never heard of a JRCA.
        Mark
        Mark Masa
        www.linkcycles.com

        Comment


        • #5
          Thanks for the info, Mark. We'll assume the R was really a D on the engine.

          Comment

          Working...
          X