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Adding a carb gantry to your Norton Commando

Discussion in 'Norton Commando Motorcycles (Classic)' started by p400, Aug 18, 2019.

  1. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    Can this madass140 gantry be added to a Mk3?
    It appears to quicken the throttle twist.

    Article in Sept/Oct 2019 Motorcycle Classics, 27 photo steps,
    on the newstand right now!
    Mechanically ties both Amals together with single cable pull.


    20190818_173941.jpg
     
    Last edited: Aug 19, 2019
  2. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
  3. joe czech

    joe czech

    Joined:
    Feb 21, 2019
    Sept/Oct, but what YEAR - Motorcycle Classics magazine? would like to read the complete article - :cool:
     
  4. swooshdave

    swooshdave

    Joined:
    Apr 15, 2009
    Shouldn’t make any difference. Maybe @madass140 has more insight?
     
  5. Phil Myers

    Phil Myers

    Joined:
    Jul 1, 2018
    Put one on my MK3 without any issues...
     
    p400 likes this.
  6. Craig

    Craig VIP MEMBER

    Joined:
    Dec 20, 2005
    Article say easier/smoother throttle twist .... guess due to less restriction , nice looking bit of kit as well ....
     
  7. joe czech

    joe czech

    Joined:
    Feb 21, 2019
  8. cyclegeezer

    cyclegeezer

    Joined:
    Jul 15, 2010
    Sept/Oct 2019
     
  9. cyclegeezer

    cyclegeezer

    Joined:
    Jul 15, 2010
    At the suggestion of another member here (sorry, don't recall who), I moved my indicator switch from the right side to the left side of the bars. It was too twitchy trying to hold steady throttle and flip indicator lever.
     
    Nater_Potater likes this.
  10. joe czech

    joe czech

    Joined:
    Feb 21, 2019
    good idea - i'll have to give that some serious consideration. one thing - did you move the "flasher" button to the right side, and the "kill" to the left? it would make sense to have the flasher button oriented with the high beam/low beam select switch. probably doesn't matter. side note - one "brain-fart" i'm considering is adding a second horn button - one left, one right. i'll pick up the spare "e-start" button as a second horn switch.
     
    Last edited: Aug 18, 2019
  11. MexicoMike

    MexicoMike

    Joined:
    Jan 31, 2010
    Totally agree re "twitchy" as far as using the blinkers with the throttle hand. I thought about swapping the switchgear years ago but haven't yet done it. I have an Alton E-start using the 'spare' button on the right and it seems "wrong" to me to have the starter on the left side. So I reach across with my left hand to use the blinkers. Yeah..sounds absurd (and is) but it's funny what you can become "used to!" ;)
     
    Nater_Potater likes this.
  12. cyclegeezer

    cyclegeezer

    Joined:
    Jul 15, 2010
    I haven't reassigned any of those wires yet, that will have to wait for a weekend when I have some time to think about what makes sense for me. I did set my Trident up with 2 horn buttons once, but changed back to one in anticipation of adding and electric start to it. Ended up with a dedicated start button elsewhere on the bike.
     
  13. Danno

    Danno

    Joined:
    Feb 7, 2010
    I used to put the kill switch on the lower left so I could bang-shift it, but a broken second gear culled that idea.
     
  14. cliffa

    cliffa

    Joined:
    May 26, 2013
    I think it was me. But even if you don't have the gantry it seems more logical to have the blinker switch on the left. I can't understand why N-V change the original layout.


    Cheers,

    cliffa.
     
  15. cliffa

    cliffa

    Joined:
    May 26, 2013
    Over the winter I took both switches off, and reworked them completely, but keeping the original wiring colours. It is possible to extract the cables from the grey sheath, but as they are spiral wound you won't easily get them back in. Luckily I found some old no longer used computer cable under the floor in our data centre at work with the same size and a very similar coloured sleeve. ;) ( I still have a bit left over if anybody wants some)

    I now have this layout:

    Left upper - Headlight Flasher
    Centre - Blinkers, up for right, down for left.
    Left bottom - Horn

    Right upper - Kill (where it's accessible / visible if the bike is on the ground).
    Centre - headlight High / low
    Right bottom - starter.

    I had to add a white/blue (or could have been blue/white :confused:) to the left cluster for the headlight flasher, and remove then re-solder most of the connections, but it's sooo much better now.


    Cheers,

    cliffa.
     
    Last edited: Aug 19, 2019
    Craig likes this.
  16. joe czech

    joe czech

    Joined:
    Feb 21, 2019
    kind of getting off topic, but a question - i'm assuming the "kill" switch is a NC connection, so where you position the kill switch would dictate which side or location of the that circuit board? i'm guessing the blinker switch should be on-off-on, where as the headlight would be on-on, with no center neutral. if the kill is NC, are the circuit board operations for the turn signals and headlight the same right to left? can I assume it's the mechanics of the switch lever itself that is the controlling factor? my Mk2 is in pieces - when I got the bike, the LH switch assembly was DOA, and the wiring in general, a total mess. I have to start from ground zero with the wiring and build new, harness assemblies for both switches. it's kind of a puzzle....

    this is where i'm at right now -

    [​IMG]
     
    p400 likes this.
  17. cliffa

    cliffa

    Joined:
    May 26, 2013
    Hi Joe,
    Yes, you are pretty much right, the switches (which I think are an excellent piece of modular engineering) are basically the same apart from the kill switch and the headlight flasher. I thought I'd taken some pictures but I can't find them. I'll take mine apart and post some piccies on a new thread. It maybe of interest to other folks too.

    Cheers,

    cliffa.
     
  18. maylar

    maylar VIP MEMBER

    Joined:
    May 13, 2007
    You are correct. The kill switch is normally closed and goes with the blinkers. The other switch on that side is usually the normally open "spare" which some of us use for e-start. The other side has the hi/lo beam paddle and 2 normally open buttons - typically horn and headlight flash.

    The paddles are different between directional indicator and headlight dimmer.

    If your switches are in good shape, you can get a kit of buttons, springs, and steel balls here:

    https://www.eurojamb.com/collection...tch-kit-custom-triumph-norton-750-850-r-buttn
     
  19. joe czech

    joe czech

    Joined:
    Feb 21, 2019
    thanks for the replies. as for the buttons, springs, etc, I bought a repair kit off fleabay (i'm thinking it was a lucas kit). it included all the pieces-parts - even got a red button for the "kill." kind of planning on the spare/e-start for a second horn button.

    on to another subject - getting ready to replace the rear iso mount - trying to do this with the engine/trans in the frame. I found someone's how-to instructions here on the forum - looks very doable. right now, the back end of the frame is supported by my engine hoist. all I have sitting on two wheels is the frame, engine, and transmission. the rear iso center shaft is free, so it's pretty much me getting off my lazy arse and wrapping things up. :D
     
  20. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    Ordered my Don Pender Amal carb gantry on Aug 18, received it today Aug 22.
    Paid with Paypal.
    It is stunning fabrication, going on a Mk3 to smooth and quicken the throttle.

    [​IMG]
     

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