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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
    The only way the carbs can be that far over is if the motor is wrongly positioned in the frame.

    Standard Mk1 premier Amals. Standard R10 head. Standard manifolds.

    New CNW isolastic that fitted in straight up. The front isolastic comes from CNW fully assembled so no chance of spacers in the wrong place. So the motor is correctly position in the frame.

    So I can't see anything wrong.

    I have just flipped the plate and it will all work perfectly. Also need to reverse the lifting disc but that is easy with a small spacer.
     
    gortnipper likes this.
  2. Time Warp

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

    Joined:
    Dec 3, 2012
    That will do it then.
    Maybe it is a fuel tank tunnel width/offset.
     
  3. gortnipper

    gortnipper VIP MEMBER

    Joined:
    Nov 11, 2013
    And here I was going to offer to buy it off of you. Well done.
     
  4. johnm

    johnm VIP MEMBER

    Joined:
    Feb 26, 2008
    I have just measured the motor position and compared it to another 850. Identical within a mm.

    So given standard Premier Mk1 on standard manifolds and standard head the only thing that can be wrong is the tank
     
    Last edited: Jan 15, 2020
  5. madass140

    madass140 VIP MEMBER

    Joined:
    Nov 6, 2011
    the kit works better on MK1 Amals. If the motor is not leaning over because of bad isolastics then any interference
    is caused by some aftermarket tanks or some fiberglass tanks.
     
  6. johnm

    johnm VIP MEMBER

    Joined:
    Feb 26, 2008
    Hi

    Sorry Amal Premier Mk 1 carbs. My mistake I typed it wrong.

    The Isolastics are brand new. CNW.

    The steel Roadster tank is original. I have owned it 41 years and know the previous owner. Talked to him about it today so the history is known from the day it left the dealer Lawton and Boyle, Adelaide Rd. Wellington NZ in 1975. According to factory records it was assembled 26 August 1974. Batch No. NM 30/74. Mind you that was a Monday.


    I'm making a mirror image base plate so I can flip the cable to the right hand side. Given Commano engines are installed offset to the left there is more clearance on the right than the left.
     
    Last edited: Jan 15, 2020
  7. olympus

    olympus

    Joined:
    Aug 5, 2017
    Anything...?
     
  8. ninja

    ninja

    Joined:
    Oct 10, 2017
    Hi whats the the cost of one of these Inc shipping to UK.
     
  9. joe czech

    joe czech

    Joined:
    Feb 21, 2019
    seems to me, I paid $134 shipped. Don ships these from the Philippines, and I would imagine shipping to the UK is the same as shipping to the USA - I recall the shipping part was $34, and i'm guessing it's a flat rate.
     
  10. olympus

    olympus

    Joined:
    Aug 5, 2017
    let me check back...
     
  11. olympus

    olympus

    Joined:
    Aug 5, 2017
    $157.10 in March this year
     
  12. madass140

    madass140 VIP MEMBER

    Joined:
    Nov 6, 2011
    the kits are all identical, CNC machined etc. I can only guess why it wont fit your particular bike.
     
  13. madass140

    madass140 VIP MEMBER

    Joined:
    Nov 6, 2011
    US$100 + shipping, Shipping to anywhere in the the US seems to be pretty much the same everywhere, EVERY where else in the world
    depends on Post Code NOT just by country. I only have 2 left anyway.
     
    NorCat and ninja like this.
  14. MexicoMike

    MexicoMike

    Joined:
    Jan 31, 2010
    Johnm - I'm interested in the "flipping of the plate" you did to fit your tank. I'm going to take a look today and see if that "option" will work with my Fastback tank!

    Ninja - If I try that and it doesn't work, AND you can wait that long, I can bring the kit with me when we come to the UK in mid May and you can have it for 50 Pounds (I don't know where the pound symbol is on my US keyboard!). We spend 5 months in the UK (Bath) each year, from mid May to the end of Oct.
     
  15. ninja

    ninja

    Joined:
    Oct 10, 2017
    OK thanks buddy I've got a few more jobs to do so can wait.
     
  16. MexicoMike

    MexicoMike

    Joined:
    Jan 31, 2010
    Flipping the plate didn't make any difference - my Fastback tank is symmetrical on both sides. So if you want, I'll bring it with me to Bath in May.
     
  17. johnm

    johnm VIP MEMBER

    Joined:
    Feb 26, 2008
    Interesting.

    Your tank and my Roadster tank are both symmetrical. But that's irrelevant.

    The engine location and hence the carb location is NOT symmetrical.

    All Norton Commando engines are installed offset to the left by 1/8 to 3/16 of an inch. 3.125 to 4.68 mm.

    If you take your tank off and look vertically down at the standard installed carbs you will see the left hand carb top sticks out more than the right one.

    If you instal the cable lift mechanism on the left side as supplied this offset works against you. Flipping it to the right and it works for you.

    In my case I can move the mechanism about 8 mm closer to the main tube of the frame by flipping it.

    The fact the tank is symmetrical doesn't matter.

    The point is that the engine location and hence the carb location is NOT SYMETRICAL with respect to the main frame tube.

    https://www.accessnorton.com/NortonCommando/is-the-engine-offset.13466/


    Earlier I asked for any thoughts or issues as to why the left versus right instal was selected.

    The only ones that occur to me is that the wiring clutch cable and rocker feed already are on the right so perhaps it was a little crowded.

    And obviously in 99 cases out of 100 the left side works perfectly well.
     
    Last edited: Jan 15, 2020
  18. johnm

    johnm VIP MEMBER

    Joined:
    Feb 26, 2008
    Unfortunately the Commando wasn't CNC machined. ;-)

    The bikes including tanks have more variation than the kit it seems.

    But I think I have a solution by flipping the base plate. I'll make a new one because there is insufficient material for the repositioned carb top holes and shall report back. I'll also reverse the lifting ,"disc" which will require drilling a new grub screw location hole and a spacer. Fortunately the lifting bar is just long enough.
     
  19. Time Warp

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

    Joined:
    Dec 3, 2012
    It depends how much it is contacting by.
    I looked at the one I have and the anchor post could be relieved a little on the outside as could the actuating arm so the cable drum could be moved inward a few mm's.
    Just a bit of time in the mill for 4 mm or so if it rubbing by a small amount not including engine vibration.
     
  20. HRD

    HRD

    Joined:
    Mar 21, 2011
    "the only mod I have made is to replace the Philips head top cap screws "

    Think they are posidrive,if you use a Philips driver you will mess the head of the screw.
     

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