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Madass140 Single Throttle Cable Amal Kit

Discussion in 'Norton Commando Motorcycles (Classic)' started by swooshdave, Jul 22, 2019.

  1. johnm

    johnm VIP MEMBER

    Joined:
    Feb 26, 2008
    Thanks. That's a useful photo and I will compare with mine today. I'm using the original 2 BA screws and fitting went fine apart from changing the throttle nipple. Silver soldered a new nipple. The cable adapter was too large in diameter to fit into my throttle grip.

    I imagine there have been many many types of throttle hand pieces out there over the years.

    If I can find a fix to the clearance issue I'll get some longer 2 BA cap screws. Allan keys are much easier to use on the carb tops.
     
    Last edited: Jan 14, 2020
  2. MexicoMike

    MexicoMike

    Joined:
    Jan 31, 2010
    With a metal tank, and not too much of a clearance problem, some judicious "denting" may do the job if you don't object to doing that to the tank.
     
  3. johnm

    johnm VIP MEMBER

    Joined:
    Feb 26, 2008
    Its a very nice tank. :-(
     
  4. batrider

    batrider

    Joined:
    Aug 9, 2008
    Try adjusting the tank upwards with more rubbers on the mounting studs. No don't dent the tank. Bad idea.
     
    swooshdave likes this.
  5. blaisestation

    blaisestation

    Joined:
    Apr 10, 2008
    I have a 74 mk 2 (jun) Roadster, and no interference problems with Dons gantry.
    Maybe new inner tank rubbers (that sit on the top frame rail) are in order ?
     
  6. johnm

    johnm VIP MEMBER

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    Feb 26, 2008
    Definitely rubb
     
  7. Time Warp

    Time Warp .......back to the 70's. VIP MEMBER

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    Dec 3, 2012
  8. batrider

    batrider

    Joined:
    Aug 9, 2008
    Blaisestatiom is more correct. The tank might be raised using thicker foam pads. The rubbers on tbe tank studs are just to keep it from rocking, not support, according to past posts that made sense.
     
  9. Time Warp

    Time Warp .......back to the 70's. VIP MEMBER

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    Dec 3, 2012
    The cable anchor is hitting the inside of the tunnel ?
     
  10. johnm

    johnm VIP MEMBER

    Joined:
    Feb 26, 2008
    I
    Would have to raise it an additional 25 mm over standard. I just tried it and it raises the back so high that the front actually hits the steering head unless I put something like 12 rubber washers on it at the front. Which of course means the stud is too short
     
  11. Time Warp

    Time Warp .......back to the 70's. VIP MEMBER

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    Dec 3, 2012
    Where is the fuel cap ?
     
  12. johnm

    johnm VIP MEMBER

    Joined:
    Feb 26, 2008
    T
    The pillar is hitting thebinside of the tunnel

    20200115_110922.jpg 20200115_111010.jpg 20200115_110922.jpg 20200115_111010.jpg
    Unfortunatly all the information here is for the tunnel at the front. I'm looking for the measurement at the back by the taps
     

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  13. johnm

    johnm VIP MEMBER

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    Feb 26, 2008
    What has the fuel cap got to do with my problem. Sorry I don't understand
     
  14. joe czech

    joe czech

    Joined:
    Feb 21, 2019
    good point. on my installation, everything associated with the tank mounting was new.
     
    Last edited: Jan 17, 2020
  15. Time Warp

    Time Warp .......back to the 70's. VIP MEMBER

    Joined:
    Dec 3, 2012
    I have 120 mm at that point but my tank based on that thread might not be reliable.
    The DP cable anchor is a good 10/15 mm clearance to the tunnel wall.
     
  16. joe czech

    joe czech

    Joined:
    Feb 21, 2019
    this may be a dumb question, but is your tank perfectly centered on the frame? it wouldn't need to be off by much to cause interference. just grabbing at straws.
     
  17. johnm

    johnm VIP MEMBER

    Joined:
    Feb 26, 2008
    Y
    Yes it is centred. I can push it 10 mm off centre to get clearance.

    But at the end of the day I can't fit a 59 mm object into a 58 mm space.

    So looks like I'm back to standard
     
  18. Scout63

    Scout63 VIP MEMBER

    Joined:
    Nov 24, 2016
    I need that. How can I get it.
     
  19. johnm

    johnm VIP MEMBER

    Joined:
    Feb 26, 2008
    One solution is to flip it over. The Norton n engine is offset in the frame to the left. By flipping the lift mechanism to the right hand side you have way more clearance.

    Can you think of any reason it was made to fit on the left side which has less clearance?

    I need to make a new plate and change round spacers etc. But that should not be much of a challenge. I have access to a workshop that makes DOHC Velo engines from scratch
     
  20. Time Warp

    Time Warp .......back to the 70's. VIP MEMBER

    Joined:
    Dec 3, 2012
    You need to consider some things.

    The part is made via CNC so a program glitch is unlikely on one item.
    (I can measure the gantry I have as a comparison)

    No one else seems to have a clearance problem and I believe I saw somewhere 100 or so have been made.

    Its easy, something is not as it should be and even if the unit can be used as per you say (cable on the right) , that original something will still be there if excluding the bracket.
    #
    Remember when I was chasing an oddity with my replacement 850 crankshaft and it turned out to be the main bearing outer race contacting the crank cheek from the factory due to a 0 to 0.019" discrepancy.
    Once found, not so hard to fix with some surface grinding.

    The problem might be something simple or overlooked.
     
    Last edited: Jan 14, 2020

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