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How to remove Airbox from Mk3

Discussion in 'Norton Commando Motorcycles (Classic)' started by p400, Mar 15, 2019.

  1. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    I am wanting to remove the airbox from a Mk3. The top bolt is an easy remove, but the bottom 2 bolts and actually pulling the airbox out look like a problem.

    What say the hands on mechanic here please?

    6322AirboxViews.jpg
     
  2. L.A.B.

    L.A.B. Moderator VIP MEMBER

    Joined:
    Nov 20, 2004
  3. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    Is there an article on converting to an earlier Norton style airbox?

    Or is the change a "bolt-in"?

    AirboxMk2a1.jpg
     
  4. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    Okay, thanks, I see the earlier removal words from ausnorton -

    Hello ,
    I know its a bit late but for anyone else out there this is how I got my airbox out yesterday.
    Remove carbs and manifold ,
    Remove starter motor,
    Remove oil tank bolts ( you may not need to actually do this but I did anyway for a bit more wiggle room ),
    Remove the cylinder head oil feed line support bolt / spring , ( not banjo fitting )
    Remove airbox bolts / nuts ,
    Rotate the bottom intake side up , and then rotate to the right as if you are trying to push it out the right side as much as it will go , keeping the engine earth lead and head oil feed lines clear ,
    Then bring it back out the left side / timing side , and voila , Its out .
    Its very tight and requires finessing but I didn't need to be too brutal about it , and no need to cut tabs or remove battery tray .
    Now to fit the Mikuni carb :D
    Cheers
    Bal

    ausnorton, Jun 8, 2015
     
  5. L.A.B.

    L.A.B. Moderator VIP MEMBER

    Joined:
    Nov 20, 2004
    See Peter Joe's post in the previous link regarding the lower mountings.

    A new LH side panel upper mounting bracket will either have to be fabricated (or bought) as the standard bracket is attached to the airbox.
     
    p400 likes this.
  6. p400

    p400 VIP MEMBER

    Joined:
    Jul 14, 2014
    Old Britts Z bracket looks like a nice solution for missing dzus.

    OldBrittsBracketDzus.jpg
     
  7. Madnorton

    Madnorton VIP MEMBER

    Joined:
    Jun 9, 2008
    If it has the riveted top bracket than the above will not work, the MK2A airbox has captive nuts so the bracket can be removed - why the backwards move for the MK3 is anyones guess.
     

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