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Removing speedo gearbox

Discussion in 'Norton Commando Motorcycles (Classic)' started by Chris Zet, Jan 13, 2020 at 6:46 AM.

  1. Chris Zet

    Chris Zet

    Joined:
    Aug 14, 2009
    Hello and a happy new year to you all!


    I bought a electronic speedometer…..

    the one from Legendary Motorcylces with the GPS-antenna.


    So i will get rid off my speedometer gearbox.


    Here is my question:

    When i remove the speedometer gearbox [060627] have i just to keep the hat spacer

    [NM13270] in place? Nothing else to do....?

    Or

    I remove the gearbox AND the hat spacer and put instead in

    a spacer with 7.9mm length, 14.7mm bore and 25mm outside diameter

    [or 2 x rear spindle washer (NM19266)]?


    Am i right?

    Chris
     
  2. bill

    bill

    Joined:
    Jun 1, 2003
    The only thing i did on mine was to change the wheel bearings to sealed bearings
     
  3. MichaelB

    MichaelB VIP MEMBER

    Joined:
    Jan 14, 2004
    I'm interested in this and curious to see how it works.
    I assume it's the Norton one? Where does the antenna go?



    Are you saying you left the gearbox in?
     
  4. bill

    bill

    Joined:
    Jun 1, 2003
    no i removed the gearbox and top hat spacer. I also mounted the antenna on top of the tail light fairing with its size and black IMHO it is a nice fit
     
  5. illf8ed

    illf8ed VIP MEMBER

    Joined:
    Dec 30, 2003
    You might want to put a washer in place of the speedo gearbox as a spacer just so the swing arm doesn’t have to flex to make up that space.
     
  6. Ibex

    Ibex

    Joined:
    Jul 31, 2013
    Just use the top hat spacer.
     
    Hortons Norton likes this.
  7. Chris Zet

    Chris Zet

    Joined:
    Aug 14, 2009
    thanks for the replies....
    ad MichaelB: i try to put the antenna on the fat crossbar of the frame between the petroltank and the fork yoke. if it doesn`t fit there i`ll put the antenna under my hump of the seat
     
  8. blaisestation

    blaisestation

    Joined:
    Apr 10, 2008
    Put mine on the inside of the headlight ear.
    Works fine,and you wouldn't know it was there unless I showed you
     
    concours and Chris Zet like this.
  9. MichaelB

    MichaelB VIP MEMBER

    Joined:
    Jan 14, 2004
    How big is the antenna?
     
  10. Chris Zet

    Chris Zet

    Joined:
    Aug 14, 2009
    that`s a good idea!!!! thanks!
     
  11. bill

    bill

    Joined:
    Jun 1, 2003
    I feel that the thickness lost from the gear box and spacer is a non issue
     
  12. Hortons Norton

    Hortons Norton

    Joined:
    Oct 12, 2007
    I think that's the best idea as the top hat also helps supports the axle as it goes through the other spacer.
     
  13. Chris Zet

    Chris Zet

    Joined:
    Aug 14, 2009
    this does surprise me......cause the hat spacer is 7.9mm long [axial length] ..... i would doublecheck that, cause me thinking you bend the swingarm inwards
     
  14. maylar

    maylar VIP MEMBER

    Joined:
    May 13, 2007
    Wouldn't the rear wheel be free to slide on the axle and disengage from the drive paddles without a spacer?
     
  15. Hortons Norton

    Hortons Norton

    Joined:
    Oct 12, 2007
    It seems to me the clamping force is on the top of the hat, outer part. And the part of it that fits inside the spacer locates the axle.
     
  16. bill

    bill

    Joined:
    Jun 1, 2003
    The “brim” is the only part that has any effect on the distance from the wheel to the swing arm the top is the part that centers the drive to the wheel.
     
  17. illf8ed

    illf8ed VIP MEMBER

    Joined:
    Dec 30, 2003
    Putting a washer in was just a suggestion. The swing arm will bend by the thickness of the speedo drive housing when the axle bolt is tightened.
     
  18. bill

    bill

    Joined:
    Jun 1, 2003
    And i would venture to say not much but i have seen where you have to force the wheel spacer in as the assembly is to wide
     

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