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What is Small Hole in Lower "ANG" Type Yoke

Discussion in 'Norton Commando Motorcycles (Classic)' started by thunderbolt, Dec 12, 2018.

  1. thunderbolt

    thunderbolt

    Joined:
    May 16, 2016
    I am replacing the steering head bearings in my '74 Roadster as part of it's restoration. I have come across a small hole (about 3/8") in the lower steering yoke.

    Can anyone advise me what it is there for? It looks like it was original from the factory like that - not done at a later date by someone trying to modify something.

    Thanks
    Don
     
  2. L.A.B.

    L.A.B. Moderator VIP MEMBER

    Joined:
    Nov 20, 2004
  3. thunderbolt

    thunderbolt

    Joined:
    May 16, 2016
    Thanks les, Appreciated.

    Cheers
    Don
     
  4. johnny Lagdon

    johnny Lagdon

    Joined:
    Nov 18, 2016
    I have had one of these kits fitted for years. my question is what is the purpose of the rod that attaches to a bracket on the bottom and the coil bracket and frame bracket at the top?
    As the damper is held securely to the frame downtubes, it would seem to serve no purpose.
     
    marinatlas likes this.
  5. robs ss

    robs ss VIP MEMBER

    Joined:
    Aug 16, 2016
    It appears to be there to prevent the downtube clamp from rotating (about the fore-aft axis) which would fret away at the downtube.
    That way the only forces on the downtube are the push/pull of the damper.
    I think it is a good measure.
    Cheers
    Rob
     
  6. RoadScholar

    RoadScholar VIP MEMBER

    Joined:
    Dec 28, 2008
    The steering damper has been front and center in a number of posts, but, if you need one I agree with Rob SS about the purpose of the rod between the damper/downtube mount and the coil(s) mount.

    Others have said that the damper is a solution, in part, to worn ISOs and/or the wheels not being properly centered to each other and/or the centerline of the motorcycle. The lower triple clamps I have seen have holes drilled on both sides of center; I always thought that it gave the rider/owner a choice of which hand would be used to dial out a tank slapper...
     
  7. johnny Lagdon

    johnny Lagdon

    Joined:
    Nov 18, 2016
    Hi Rob, the clamp in the kit clamps on both downtubes, and as it is angled to match the angle of the tubes, it can only go in 1 position and cannot move....
     
  8. Stephen Hill

    Stephen Hill

    Joined:
    Oct 28, 2009
    Johnny Lagdon asked "what is the purpose of the rod that attaches to a bracket on the bottom and the coil bracket and frame bracket at the top?"

    The purpose of the rod is to keep the bracket from sliding up and down the two frame tubes. The stock bracket is a flat piece of metal pulled against the round frame tubes by two U clamps. Not a great design. Some after market brackets utilise round clamps that fully encircle the round frame tubing. This style dispenses with the upright rod.

    Stephen Hill
     
  9. Johnny

    Johnny

    Joined:
    Dec 21, 2014
    Thanks! I now have clarity and as i have better quality clamps and dispensed with the rest i am at peace! Cheers
     

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