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Removing Pinion and Sprocket Properly

  • 22 Jan 2023 1:50 PM
    Quote
    Message # 13067945
    John Lindberg (Administrator)

    I have replaced my rear sprocket and have a NOS chain, now it's time to replace my front sprocket (I was running the parts that came with the bike, they're quite worn, and the front sprocket is sidecar size).  Any suggestions as to how to keep the pinion and sprocket from turning while I remove the nut?  My inclination would be to wedge a piece of wood against the teeth, but I suspect there's a proper tool or technique I'm not aware of.

    Thanks,

    John
  • 23 Jan 2023 3:51 AM
    Quote
    Reply # 13068621 on 13067945
    Ken Lee
    Hello John , A piece of wood is always quite handy for many jobs when proper tools are not available and that is one way of doing this job , you could also try putting bike in first gear and applying the rear brake or both if nut is stubborn !! Good luck , Ken
  • 03 Feb 2023 7:19 PM
    Quote
    Reply # 13084429 on 13067945
    John Lindberg (Administrator)

    Just in case anybody else has the same question I did - what finally worked for me was a $50 deep-well 1 5/8" socket from Grainger, a friend with a lathe who faced the socket to remove the chamfer, and a block of wood jammed in between the sprocket and the kicker stud.  Then the nut agreed to come off.  Simple!
  • 04 Feb 2023 4:25 AM
    Quote
    Reply # 13084667 on 13067945
    Ken Lee

    Glad it worked out well for you ! I don't know why sockets have that chamfer ? quite often they need skimming in a lathe !?
  • 10 Jul 2025 9:51 AM
    Quote
    Reply # 13519356 on 13067945
    Mike Ritchey

    About to do this job myself and just wanted to know if you could confirm the direction of the thread  on the sprocket retaining nut.  I assume it would be right hand thread since the sprocket is splined but just want to check before I go crazy.


    Mike Ritchey

    1928 Scout Short Frame Police Special


    I went for it....  It is a right hand thread....

    Last modified: 10 Jul 2025 7:19 PM | Mike Ritchey
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