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Speedo drive ratio and sprocket

Discussion in 'Norton P11 Motorcycles' started by pierodn, Sep 18, 2016.

  1. pierodn

    pierodn

    Joined:
    Nov 10, 2012
    Hi.
    Please, what is the speedo drive ratio?
    Howh many theet has the gearbox sprocket?
    Thank you.
    Piero
     
  2. Mike B

    Mike B

    Joined:
    Oct 16, 2015
    The original size sprocket is 19 teeth. The speedo drive ratio is the same as Atlas, but the drive itself is different.

    Mike B.
     
  3. L.A.B.

    L.A.B. Moderator VIP MEMBER

    Joined:
    Nov 20, 2004
    2:1 according to my Smiths list. The P11 drive gearbox was BG 5330/257 and the speedo was SSM 3001/00.
     
  4. pierodn

    pierodn

    Joined:
    Nov 10, 2012
    Hi Les,
    Thank you.
    Ciao
    Piero
     
  5. Sloppy Link

    Sloppy Link

    Joined:
    Feb 18, 2016
    Anyone have a source for the speedo drive? Mine is shot, the replacement from Andover Norton cannot accept the spacer as the centre hole is too small.
     
  6. Ron L

    Ron L VIP MEMBER

    Joined:
    Feb 27, 2004
  7. texasSlick

    texasSlick VIP MEMBER

    Joined:
    Jan 2, 2013
    If you can get a NOS Smith's drive, spend the money. The knockoffs are junk.

    Slick
     
  8. CanukNortonNut

    CanukNortonNut

    Joined:
    Aug 8, 2005
    Les, I have a BG5330/267 would that work?
    Cheers,
    Thomas
     
  9. Ron L

    Ron L VIP MEMBER

    Joined:
    Feb 27, 2004
    BG5330-267 has a 7/8" bore and 2:1 ratio while the 257 has a 3/4" bore. You may need to make a special bushing to centralize the gearbox on the spacer/bushing setup (P/N 28070 and 28073).
     
  10. CanukNortonNut

    CanukNortonNut

    Joined:
    Aug 8, 2005
    Thanks Ron,
    Cheers,
    Tom
     

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